/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:59:35,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:59:35,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:59:35,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:59:35,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:59:35,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:59:35,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:59:35,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:59:35,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:59:35,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:59:35,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:59:35,646 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:59:35,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:59:35,647 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:59:35,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:59:35,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:59:35,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:59:35,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:59:35,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:59:35,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:59:35,648 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:59:35,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:59:35,648 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:59:35,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:59:35,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:59:35,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:59:35,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:59:35,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:59:35,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:59:35,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:59:35,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:59:35,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:59:35,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:59:35,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:59:35,650 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:59:35,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:59:35,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:59:35,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:59:35,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:59:35,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:59:35,972 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:59:35,974 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:59:35,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-06-05 22:59:35,988 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-06-05 22:59:36,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:59:36,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:59:36,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:59:36,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:59:36,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:59:36,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:59:36,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:59:36,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:59:36,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:59:36,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/1) ... [2021-06-05 22:59:36,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:59:36,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:59:36,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:59:36,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:59:36,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (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 [2021-06-05 22:59:36,108 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:59:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:59:36,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:59:36,108 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:59:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:59:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:59:36,109 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:59:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:59:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:59:36,109 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:59:36,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:59:36,310 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:59:36,312 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:59:36 BoogieIcfgContainer [2021-06-05 22:59:36,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:59:36,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:59:36,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:59:36,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:59:36,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:59:36" (1/2) ... [2021-06-05 22:59:36,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1e639 and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:59:36, skipping insertion in model container [2021-06-05 22:59:36,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:59:36" (2/2) ... [2021-06-05 22:59:36,318 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-06-05 22:59:36,326 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:59:36,326 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:59:36,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:59:36,328 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:59:36,388 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 22:59:36,421 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 22:59:36,451 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:59:36,451 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:59:36,451 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:59:36,451 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:59:36,452 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:59:36,452 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:59:36,452 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:59:36,452 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:59:36,459 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-05 22:59:36,468 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:59:36,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:36,475 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:36,475 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:36,483 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-06-05 22:59:36,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:36,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199081348] [2021-06-05 22:59:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:36,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:36,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199081348] [2021-06-05 22:59:36,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199081348] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:59:36,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:59:36,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:59:36,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2429084] [2021-06-05 22:59:36,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:59:36,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:36,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:59:36,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:59:36,659 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:36,714 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-05 22:59:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:59:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:59:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:36,727 INFO L225 Difference]: With dead ends: 43 [2021-06-05 22:59:36,727 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 22:59:36,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:59:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 22:59:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-05 22:59:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-05 22:59:36,765 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-05 22:59:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:36,766 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-05 22:59:36,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-05 22:59:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:59:36,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:36,768 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:36,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:59:36,768 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:36,772 INFO L82 PathProgramCache]: Analyzing trace with hash 759896365, now seen corresponding path program 1 times [2021-06-05 22:59:36,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:36,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685028692] [2021-06-05 22:59:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:59:36,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:36,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685028692] [2021-06-05 22:59:36,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685028692] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:59:36,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:59:36,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:59:36,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417368610] [2021-06-05 22:59:36,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:59:36,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:36,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:59:36,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:59:36,845 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:36,880 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-05 22:59:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:59:36,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-06-05 22:59:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:36,882 INFO L225 Difference]: With dead ends: 50 [2021-06-05 22:59:36,882 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 22:59:36,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:59:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 22:59:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-05 22:59:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-05 22:59:36,889 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-05 22:59:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:36,890 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-05 22:59:36,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-05 22:59:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:59:36,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:36,891 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:36,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:59:36,892 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-06-05 22:59:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:36,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423002767] [2021-06-05 22:59:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:37,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423002767] [2021-06-05 22:59:37,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423002767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55221689] [2021-06-05 22:59:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:59:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:37,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55221689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:37,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:37,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:59:37,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30885657] [2021-06-05 22:59:37,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:59:37,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:59:37,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:59:37,669 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:37,836 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-06-05 22:59:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:59:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:59:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:37,837 INFO L225 Difference]: With dead ends: 108 [2021-06-05 22:59:37,837 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 22:59:37,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:59:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 22:59:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-06-05 22:59:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 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) [2021-06-05 22:59:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-06-05 22:59:37,843 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-06-05 22:59:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:37,843 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-06-05 22:59:37,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-06-05 22:59:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:59:37,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:37,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:38,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 22:59:38,067 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash 242654451, now seen corresponding path program 2 times [2021-06-05 22:59:38,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:38,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729356490] [2021-06-05 22:59:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:38,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729356490] [2021-06-05 22:59:38,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729356490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015557191] [2021-06-05 22:59:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:38,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:38,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:59:38,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:38,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015557191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:38,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:38,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:59:38,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316239023] [2021-06-05 22:59:38,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:59:38,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:59:38,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:59:38,575 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:38,973 INFO L93 Difference]: Finished difference Result 130 states and 236 transitions. [2021-06-05 22:59:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:59:38,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:59:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:38,975 INFO L225 Difference]: With dead ends: 130 [2021-06-05 22:59:38,975 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 22:59:38,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:59:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 22:59:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2021-06-05 22:59:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 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) [2021-06-05 22:59:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-06-05 22:59:38,992 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-06-05 22:59:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:38,993 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-06-05 22:59:38,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-06-05 22:59:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:59:38,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:38,994 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:39,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:39,213 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash 892723421, now seen corresponding path program 3 times [2021-06-05 22:59:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:39,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124421284] [2021-06-05 22:59:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:39,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124421284] [2021-06-05 22:59:39,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124421284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304190412] [2021-06-05 22:59:39,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:39,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:59:39,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:39,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:59:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304190412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:39,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:39,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:59:39,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570701372] [2021-06-05 22:59:39,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:59:39,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:59:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:59:39,640 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:39,840 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-06-05 22:59:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:59:39,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:59:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:39,842 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:59:39,842 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 22:59:39,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:59:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 22:59:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-06-05 22:59:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-06-05 22:59:39,847 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-06-05 22:59:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:39,847 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-06-05 22:59:39,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-06-05 22:59:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:39,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:39,848 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:40,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:40,063 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 4 times [2021-06-05 22:59:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:40,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840827860] [2021-06-05 22:59:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:40,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:40,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840827860] [2021-06-05 22:59:40,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840827860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:40,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663585688] [2021-06-05 22:59:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:40,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:40,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:40,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:40,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:40,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663585688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:40,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:40,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:40,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873938920] [2021-06-05 22:59:40,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:40,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:40,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:40,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:40,674 INFO L87 Difference]: Start difference. First operand 55 states and 103 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) [2021-06-05 22:59:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:41,053 INFO L93 Difference]: Finished difference Result 117 states and 220 transitions. [2021-06-05 22:59:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:59:41,054 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 [2021-06-05 22:59:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:41,056 INFO L225 Difference]: With dead ends: 117 [2021-06-05 22:59:41,056 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 22:59:41,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 592.2ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:59:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 22:59:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2021-06-05 22:59:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-06-05 22:59:41,062 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-06-05 22:59:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:41,062 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-06-05 22:59:41,062 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) [2021-06-05 22:59:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-06-05 22:59:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:41,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:41,063 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:41,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:41,281 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1509256847, now seen corresponding path program 5 times [2021-06-05 22:59:41,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:41,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947277959] [2021-06-05 22:59:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:41,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:41,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947277959] [2021-06-05 22:59:41,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947277959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:41,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797126945] [2021-06-05 22:59:41,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:41,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:59:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:41,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797126945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:41,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:41,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:41,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097395047] [2021-06-05 22:59:41,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:41,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:41,800 INFO L87 Difference]: Start difference. First operand 72 states and 138 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) [2021-06-05 22:59:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:42,217 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2021-06-05 22:59:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:59:42,218 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 [2021-06-05 22:59:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:42,219 INFO L225 Difference]: With dead ends: 133 [2021-06-05 22:59:42,219 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 22:59:42,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 548.6ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:59:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 22:59:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-06-05 22:59:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-06-05 22:59:42,224 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 21 [2021-06-05 22:59:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:42,225 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-06-05 22:59:42,225 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) [2021-06-05 22:59:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-06-05 22:59:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:42,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:42,226 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:42,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 22:59:42,448 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:42,449 INFO L82 PathProgramCache]: Analyzing trace with hash -859187877, now seen corresponding path program 6 times [2021-06-05 22:59:42,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:42,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984381883] [2021-06-05 22:59:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:42,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984381883] [2021-06-05 22:59:42,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984381883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464815411] [2021-06-05 22:59:42,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:42,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:59:42,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:42,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:42,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464815411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:42,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:42,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041099223] [2021-06-05 22:59:42,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:42,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:42,912 INFO L87 Difference]: Start difference. First operand 73 states and 142 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) [2021-06-05 22:59:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:43,311 INFO L93 Difference]: Finished difference Result 113 states and 215 transitions. [2021-06-05 22:59:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:59:43,311 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 [2021-06-05 22:59:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:43,312 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:59:43,312 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:59:43,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 511.0ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:59:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:59:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-06-05 22:59:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-06-05 22:59:43,317 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-06-05 22:59:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:43,317 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-06-05 22:59:43,317 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) [2021-06-05 22:59:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-06-05 22:59:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:43,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:43,318 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:43,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:43,529 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1888068795, now seen corresponding path program 7 times [2021-06-05 22:59:43,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:43,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908908997] [2021-06-05 22:59:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:43,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:43,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908908997] [2021-06-05 22:59:43,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908908997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:43,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90232240] [2021-06-05 22:59:43,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:43,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:43,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90232240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:43,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:43,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:43,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364051965] [2021-06-05 22:59:43,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:43,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:43,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:43,911 INFO L87 Difference]: Start difference. First operand 72 states and 138 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) [2021-06-05 22:59:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:44,213 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2021-06-05 22:59:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:59:44,213 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 [2021-06-05 22:59:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:44,214 INFO L225 Difference]: With dead ends: 176 [2021-06-05 22:59:44,214 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 22:59:44,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:59:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 22:59:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 72. [2021-06-05 22:59:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-05 22:59:44,219 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 21 [2021-06-05 22:59:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:44,219 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-05 22:59:44,219 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) [2021-06-05 22:59:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-05 22:59:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:44,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:44,220 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:44,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:44,437 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1756829531, now seen corresponding path program 8 times [2021-06-05 22:59:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:44,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162111022] [2021-06-05 22:59:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:44,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:44,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162111022] [2021-06-05 22:59:44,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162111022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:44,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977236419] [2021-06-05 22:59:44,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:44,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:44,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:44,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:44,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977236419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:44,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:44,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:44,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885871132] [2021-06-05 22:59:44,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:44,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:44,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:44,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:44,831 INFO L87 Difference]: Start difference. First operand 72 states and 142 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) [2021-06-05 22:59:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:45,165 INFO L93 Difference]: Finished difference Result 163 states and 289 transitions. [2021-06-05 22:59:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:59:45,166 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 [2021-06-05 22:59:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:45,167 INFO L225 Difference]: With dead ends: 163 [2021-06-05 22:59:45,167 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 22:59:45,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:59:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 22:59:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2021-06-05 22:59:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-06-05 22:59:45,171 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 21 [2021-06-05 22:59:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:45,171 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-06-05 22:59:45,171 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) [2021-06-05 22:59:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-06-05 22:59:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:45,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:45,172 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:45,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:59:45,385 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash 477277963, now seen corresponding path program 9 times [2021-06-05 22:59:45,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:45,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642378422] [2021-06-05 22:59:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:45,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:45,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642378422] [2021-06-05 22:59:45,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642378422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:45,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381698979] [2021-06-05 22:59:45,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:45,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:59:45,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:45,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:45,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381698979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:45,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:45,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:45,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308667409] [2021-06-05 22:59:45,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:45,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:45,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:45,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:45,767 INFO L87 Difference]: Start difference. First operand 71 states and 138 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) [2021-06-05 22:59:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:45,990 INFO L93 Difference]: Finished difference Result 104 states and 188 transitions. [2021-06-05 22:59:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:59:45,991 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 [2021-06-05 22:59:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:45,991 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:59:45,991 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:59:45,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:59:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:59:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-06-05 22:59:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-06-05 22:59:45,995 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-06-05 22:59:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:45,995 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-06-05 22:59:45,995 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) [2021-06-05 22:59:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-06-05 22:59:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:45,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:45,996 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:46,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:46,197 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:46,197 INFO L82 PathProgramCache]: Analyzing trace with hash -362797707, now seen corresponding path program 10 times [2021-06-05 22:59:46,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:46,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111425941] [2021-06-05 22:59:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:46,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111425941] [2021-06-05 22:59:46,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111425941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792872786] [2021-06-05 22:59:46,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:46,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:46,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:46,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792872786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:46,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:46,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:46,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872312010] [2021-06-05 22:59:46,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:46,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:46,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:46,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:46,566 INFO L87 Difference]: Start difference. First operand 73 states and 141 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) [2021-06-05 22:59:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:47,057 INFO L93 Difference]: Finished difference Result 171 states and 307 transitions. [2021-06-05 22:59:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:59:47,058 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 [2021-06-05 22:59:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:47,059 INFO L225 Difference]: With dead ends: 171 [2021-06-05 22:59:47,059 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 22:59:47,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 22:59:47,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 77. [2021-06-05 22:59:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 153 transitions. [2021-06-05 22:59:47,063 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 153 transitions. Word has length 21 [2021-06-05 22:59:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:47,064 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 153 transitions. [2021-06-05 22:59:47,064 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) [2021-06-05 22:59:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 153 transitions. [2021-06-05 22:59:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:47,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:47,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:47,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:47,269 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash 287271263, now seen corresponding path program 11 times [2021-06-05 22:59:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:47,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13576979] [2021-06-05 22:59:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:47,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13576979] [2021-06-05 22:59:47,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13576979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713031985] [2021-06-05 22:59:47,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:47,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:59:47,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:47,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:47,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:47,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713031985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:47,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:47,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:47,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885932157] [2021-06-05 22:59:47,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:47,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:47,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:47,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:47,615 INFO L87 Difference]: Start difference. First operand 77 states and 153 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) [2021-06-05 22:59:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:48,125 INFO L93 Difference]: Finished difference Result 171 states and 303 transitions. [2021-06-05 22:59:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:59:48,125 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 [2021-06-05 22:59:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:48,126 INFO L225 Difference]: With dead ends: 171 [2021-06-05 22:59:48,126 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 22:59:48,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:59:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 22:59:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2021-06-05 22:59:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-06-05 22:59:48,130 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 21 [2021-06-05 22:59:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:48,130 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-06-05 22:59:48,130 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) [2021-06-05 22:59:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-06-05 22:59:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:48,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:48,131 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:48,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 22:59:48,345 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1773588539, now seen corresponding path program 12 times [2021-06-05 22:59:48,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:48,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902315310] [2021-06-05 22:59:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:48,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:48,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902315310] [2021-06-05 22:59:48,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902315310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836975008] [2021-06-05 22:59:48,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:48,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:59:48,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:48,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836975008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:48,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:48,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:48,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383315975] [2021-06-05 22:59:48,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:48,693 INFO L87 Difference]: Start difference. First operand 76 states and 149 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) [2021-06-05 22:59:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:49,130 INFO L93 Difference]: Finished difference Result 139 states and 248 transitions. [2021-06-05 22:59:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:59:49,131 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 [2021-06-05 22:59:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:49,132 INFO L225 Difference]: With dead ends: 139 [2021-06-05 22:59:49,132 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 22:59:49,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:59:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 22:59:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2021-06-05 22:59:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-06-05 22:59:49,135 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-06-05 22:59:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:49,135 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-06-05 22:59:49,136 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) [2021-06-05 22:59:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-06-05 22:59:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:59:49,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:49,137 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:49,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 22:59:49,345 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 13 times [2021-06-05 22:59:49,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:49,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075905652] [2021-06-05 22:59:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:49,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:49,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075905652] [2021-06-05 22:59:49,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075905652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:49,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642286430] [2021-06-05 22:59:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:49,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:49,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:49,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642286430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:49,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:49,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:59:49,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587432391] [2021-06-05 22:59:49,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:59:49,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:59:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:49,681 INFO L87 Difference]: Start difference. First operand 73 states and 141 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) [2021-06-05 22:59:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:49,991 INFO L93 Difference]: Finished difference Result 124 states and 220 transitions. [2021-06-05 22:59:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:59:49,991 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 [2021-06-05 22:59:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:49,992 INFO L225 Difference]: With dead ends: 124 [2021-06-05 22:59:49,992 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:59:49,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 413.3ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:59:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:59:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-06-05 22:59:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 68 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 131 transitions. [2021-06-05 22:59:49,996 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 131 transitions. Word has length 21 [2021-06-05 22:59:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:49,997 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 131 transitions. [2021-06-05 22:59:49,997 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) [2021-06-05 22:59:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 131 transitions. [2021-06-05 22:59:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:59:49,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:49,998 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:50,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:59:50,213 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1776759271, now seen corresponding path program 14 times [2021-06-05 22:59:50,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:50,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290215046] [2021-06-05 22:59:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:50,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290215046] [2021-06-05 22:59:50,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290215046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038230946] [2021-06-05 22:59:50,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:50,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:50,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:50,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:59:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:50,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038230946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:50,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:50,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:59:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009228766] [2021-06-05 22:59:50,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:59:50,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:50,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:59:50,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:59:50,651 INFO L87 Difference]: Start difference. First operand 69 states and 131 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:50,928 INFO L93 Difference]: Finished difference Result 120 states and 222 transitions. [2021-06-05 22:59:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:59:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:59:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:50,929 INFO L225 Difference]: With dead ends: 120 [2021-06-05 22:59:50,929 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:59:50,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:59:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:59:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2021-06-05 22:59:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-06-05 22:59:50,932 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 23 [2021-06-05 22:59:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:50,932 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-06-05 22:59:50,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-06-05 22:59:50,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:59:50,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:50,932 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:51,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:51,149 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 15 times [2021-06-05 22:59:51,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:51,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539783061] [2021-06-05 22:59:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:51,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:51,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539783061] [2021-06-05 22:59:51,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539783061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:51,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809472754] [2021-06-05 22:59:51,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:51,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:59:51,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:51,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:59:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:51,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809472754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:51,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:51,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:59:51,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852868255] [2021-06-05 22:59:51,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:59:51,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:51,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:59:51,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:59:51,545 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:52,408 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-06-05 22:59:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:59:52,408 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:59:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:52,409 INFO L225 Difference]: With dead ends: 225 [2021-06-05 22:59:52,409 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 22:59:52,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 947.5ms TimeCoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:59:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 22:59:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-06-05 22:59:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-06-05 22:59:52,413 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-06-05 22:59:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:52,413 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-06-05 22:59:52,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-06-05 22:59:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:59:52,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:52,414 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:52,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:59:52,636 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash 380430255, now seen corresponding path program 16 times [2021-06-05 22:59:52,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:52,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171567551] [2021-06-05 22:59:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:52,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:52,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171567551] [2021-06-05 22:59:52,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171567551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:52,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278003544] [2021-06-05 22:59:52,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:52,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:52,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:52,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:59:52,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278003544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:53,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:53,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:59:53,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604334265] [2021-06-05 22:59:53,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:59:53,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:59:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:59:53,117 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:54,437 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-06-05 22:59:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:59:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:59:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:54,438 INFO L225 Difference]: With dead ends: 293 [2021-06-05 22:59:54,438 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 22:59:54,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1262.1ms TimeCoverageRelationStatistics Valid=557, Invalid=3225, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:59:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 22:59:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-06-05 22:59:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 22:59:54,443 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-06-05 22:59:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:54,444 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 22:59:54,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 22:59:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:59:54,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:54,444 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:54,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:59:54,661 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash -884497605, now seen corresponding path program 17 times [2021-06-05 22:59:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:54,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439430283] [2021-06-05 22:59:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:54,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:54,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439430283] [2021-06-05 22:59:54,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439430283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:54,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656846854] [2021-06-05 22:59:54,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:54,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:59:54,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:54,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:59:54,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:55,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656846854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:55,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:55,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:59:55,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605795229] [2021-06-05 22:59:55,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:59:55,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:59:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:59:55,115 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:56,272 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-06-05 22:59:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:59:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:59:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:56,273 INFO L225 Difference]: With dead ends: 263 [2021-06-05 22:59:56,273 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 22:59:56,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1132.9ms TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:59:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 22:59:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-06-05 22:59:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 22:59:56,278 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-06-05 22:59:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:56,278 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 22:59:56,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 22:59:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:59:56,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:56,279 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:56,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:56,489 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash 251687667, now seen corresponding path program 18 times [2021-06-05 22:59:56,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:56,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562266411] [2021-06-05 22:59:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:56,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:56,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562266411] [2021-06-05 22:59:56,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562266411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:56,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151542436] [2021-06-05 22:59:56,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:56,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:59:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:56,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:59:56,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151542436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:56,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:56,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:59:56,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999856234] [2021-06-05 22:59:56,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:59:56,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:56,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:59:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:59:56,912 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:58,004 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-06-05 22:59:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:59:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:59:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:58,005 INFO L225 Difference]: With dead ends: 280 [2021-06-05 22:59:58,005 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 22:59:58,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 993.4ms TimeCoverageRelationStatistics Valid=546, Invalid=2876, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:59:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 22:59:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-06-05 22:59:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-06-05 22:59:58,010 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-06-05 22:59:58,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:58,010 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-06-05 22:59:58,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-06-05 22:59:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:59:58,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:58,011 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:58,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:58,225 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash 901756637, now seen corresponding path program 19 times [2021-06-05 22:59:58,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:58,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614287964] [2021-06-05 22:59:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:58,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:58,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614287964] [2021-06-05 22:59:58,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614287964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:58,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528609100] [2021-06-05 22:59:58,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:58,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:59:58,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:58,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528609100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:58,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:58,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:59:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711960081] [2021-06-05 22:59:58,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:59:58,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:59:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:59:58,574 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:59,653 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-06-05 22:59:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:59:59,654 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:59:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:59,655 INFO L225 Difference]: With dead ends: 241 [2021-06-05 22:59:59,655 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 22:59:59,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 979.5ms TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:59:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 22:59:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-06-05 22:59:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-06-05 22:59:59,659 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-06-05 22:59:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:59,659 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-06-05 22:59:59,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-06-05 22:59:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:59:59,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:59,660 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:59,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:59,869 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1035227257, now seen corresponding path program 20 times [2021-06-05 22:59:59,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:59,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270670186] [2021-06-05 22:59:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:00,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270670186] [2021-06-05 23:00:00,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270670186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915571130] [2021-06-05 23:00:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:00,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:00,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:00,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:00:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:00,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915571130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:00,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:00,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:00:00,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695867373] [2021-06-05 23:00:00,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:00:00,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:00:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:00:00,344 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:01,798 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-06-05 23:00:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:00:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:00:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:01,800 INFO L225 Difference]: With dead ends: 342 [2021-06-05 23:00:01,800 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 23:00:01,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1396.3ms TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:00:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 23:00:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-06-05 23:00:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-06-05 23:00:01,806 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-06-05 23:00:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:01,806 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-06-05 23:00:01,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:01,806 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-06-05 23:00:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:00:01,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:01,807 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:02,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:00:02,031 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash -229700603, now seen corresponding path program 21 times [2021-06-05 23:00:02,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:02,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180440517] [2021-06-05 23:00:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:02,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:02,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180440517] [2021-06-05 23:00:02,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180440517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:02,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439467876] [2021-06-05 23:00:02,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:02,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:00:02,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:02,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:00:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:02,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439467876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:02,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:02,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:00:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934801175] [2021-06-05 23:00:02,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:00:02,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:02,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:00:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:00:02,475 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:03,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:03,902 INFO L93 Difference]: Finished difference Result 335 states and 651 transitions. [2021-06-05 23:00:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:00:03,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:00:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:03,903 INFO L225 Difference]: With dead ends: 335 [2021-06-05 23:00:03,903 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 23:00:03,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1326.2ms TimeCoverageRelationStatistics Valid=546, Invalid=2994, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:00:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 23:00:03,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 154. [2021-06-05 23:00:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.261437908496732) internal successors, (346), 153 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 346 transitions. [2021-06-05 23:00:03,909 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 346 transitions. Word has length 23 [2021-06-05 23:00:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:03,909 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 346 transitions. [2021-06-05 23:00:03,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 346 transitions. [2021-06-05 23:00:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:00:03,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:03,910 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:04,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:00:04,121 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash 906484669, now seen corresponding path program 22 times [2021-06-05 23:00:04,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:04,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411465680] [2021-06-05 23:00:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:04,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:04,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411465680] [2021-06-05 23:00:04,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411465680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:04,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776671327] [2021-06-05 23:00:04,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:00:04,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:04,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:04,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:00:04,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:04,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776671327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:04,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:04,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:00:04,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888236020] [2021-06-05 23:00:04,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:00:04,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:04,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:00:04,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:00:04,576 INFO L87 Difference]: Start difference. First operand 154 states and 346 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:05,850 INFO L93 Difference]: Finished difference Result 324 states and 640 transitions. [2021-06-05 23:00:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:00:05,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:00:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:05,851 INFO L225 Difference]: With dead ends: 324 [2021-06-05 23:00:05,851 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 23:00:05,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1303.2ms TimeCoverageRelationStatistics Valid=560, Invalid=2746, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:00:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 23:00:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 149. [2021-06-05 23:00:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.2635135135135136) internal successors, (335), 148 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2021-06-05 23:00:05,857 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 23 [2021-06-05 23:00:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:05,857 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2021-06-05 23:00:05,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2021-06-05 23:00:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:00:05,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:05,858 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:06,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:06,061 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:06,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1644322069, now seen corresponding path program 23 times [2021-06-05 23:00:06,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:06,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227313273] [2021-06-05 23:00:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:06,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227313273] [2021-06-05 23:00:06,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227313273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632513087] [2021-06-05 23:00:06,227 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 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 [2021-06-05 23:00:06,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:00:06,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:00:06,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:06,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632513087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:06,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:06,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:00:06,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190245520] [2021-06-05 23:00:06,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:00:06,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:06,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:00:06,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:00:06,525 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:07,804 INFO L93 Difference]: Finished difference Result 335 states and 686 transitions. [2021-06-05 23:00:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:00:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:00:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:07,805 INFO L225 Difference]: With dead ends: 335 [2021-06-05 23:00:07,805 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 23:00:07,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1282.1ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:00:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 23:00:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 176. [2021-06-05 23:00:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2914285714285714) internal successors, (401), 175 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 401 transitions. [2021-06-05 23:00:07,810 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 401 transitions. Word has length 23 [2021-06-05 23:00:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:07,810 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 401 transitions. [2021-06-05 23:00:07,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:07,810 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 401 transitions. [2021-06-05 23:00:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:00:07,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:07,811 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:08,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:00:08,025 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash -949311587, now seen corresponding path program 24 times [2021-06-05 23:00:08,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:08,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880483344] [2021-06-05 23:00:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:08,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:08,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880483344] [2021-06-05 23:00:08,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880483344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:08,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47743652] [2021-06-05 23:00:08,169 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 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 [2021-06-05 23:00:08,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:00:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:08,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:00:08,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:08,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47743652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:08,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:08,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:00:08,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466530889] [2021-06-05 23:00:08,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:00:08,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:08,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:00:08,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:00:08,385 INFO L87 Difference]: Start difference. First operand 176 states and 401 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:09,480 INFO L93 Difference]: Finished difference Result 418 states and 882 transitions. [2021-06-05 23:00:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:00:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:00:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:09,482 INFO L225 Difference]: With dead ends: 418 [2021-06-05 23:00:09,482 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 23:00:09,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1026.1ms TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:00:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 23:00:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 193. [2021-06-05 23:00:09,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3541666666666665) internal successors, (452), 192 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 452 transitions. [2021-06-05 23:00:09,489 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 452 transitions. Word has length 23 [2021-06-05 23:00:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:09,489 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 452 transitions. [2021-06-05 23:00:09,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 452 transitions. [2021-06-05 23:00:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:09,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:09,490 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:09,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:09,705 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash 45870327, now seen corresponding path program 25 times [2021-06-05 23:00:09,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:09,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302855504] [2021-06-05 23:00:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:09,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:09,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302855504] [2021-06-05 23:00:09,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302855504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:09,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781156714] [2021-06-05 23:00:09,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:09,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:09,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:10,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781156714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:10,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:10,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:00:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823183185] [2021-06-05 23:00:10,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:00:10,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:00:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:00:10,062 INFO L87 Difference]: Start difference. First operand 193 states and 452 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:10,871 INFO L93 Difference]: Finished difference Result 441 states and 930 transitions. [2021-06-05 23:00:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:00:10,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:10,873 INFO L225 Difference]: With dead ends: 441 [2021-06-05 23:00:10,873 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 23:00:10,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 740.4ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:00:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 23:00:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 228. [2021-06-05 23:00:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-06-05 23:00:10,883 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-06-05 23:00:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:10,884 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-06-05 23:00:10,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-06-05 23:00:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:10,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:10,885 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:11,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:00:11,099 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash 695939297, now seen corresponding path program 26 times [2021-06-05 23:00:11,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:11,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849592200] [2021-06-05 23:00:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:11,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:11,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849592200] [2021-06-05 23:00:11,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849592200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382199192] [2021-06-05 23:00:11,228 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 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 [2021-06-05 23:00:11,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:11,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:11,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:11,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382199192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:11,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:11,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:00:11,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523220518] [2021-06-05 23:00:11,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:00:11,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:11,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:00:11,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:00:11,477 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:12,436 INFO L93 Difference]: Finished difference Result 450 states and 937 transitions. [2021-06-05 23:00:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:00:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:12,441 INFO L225 Difference]: With dead ends: 450 [2021-06-05 23:00:12,441 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 23:00:12,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 911.2ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:00:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 23:00:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 228. [2021-06-05 23:00:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-06-05 23:00:12,449 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-06-05 23:00:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:12,449 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-06-05 23:00:12,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-06-05 23:00:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:12,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:12,450 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:12,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:12,669 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1364920505, now seen corresponding path program 27 times [2021-06-05 23:00:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:12,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557588217] [2021-06-05 23:00:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:12,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:12,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557588217] [2021-06-05 23:00:12,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557588217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:12,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921761612] [2021-06-05 23:00:12,800 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:12,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:00:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:12,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:12,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:13,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921761612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:13,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:13,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:00:13,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128103255] [2021-06-05 23:00:13,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:00:13,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:13,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:00:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:00:13,079 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:13,803 INFO L93 Difference]: Finished difference Result 320 states and 692 transitions. [2021-06-05 23:00:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:00:13,804 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:13,805 INFO L225 Difference]: With dead ends: 320 [2021-06-05 23:00:13,805 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 23:00:13,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 739.8ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:00:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 23:00:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 230. [2021-06-05 23:00:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.4017467248908297) internal successors, (550), 229 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 550 transitions. [2021-06-05 23:00:13,810 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 550 transitions. Word has length 25 [2021-06-05 23:00:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:13,810 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 550 transitions. [2021-06-05 23:00:13,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 550 transitions. [2021-06-05 23:00:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:13,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:13,811 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:14,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 23:00:14,029 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash 740880809, now seen corresponding path program 28 times [2021-06-05 23:00:14,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:14,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972612175] [2021-06-05 23:00:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:14,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:14,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972612175] [2021-06-05 23:00:14,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972612175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:14,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964787152] [2021-06-05 23:00:14,131 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:14,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:14,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:14,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:14,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:14,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964787152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:14,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:14,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:14,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223253178] [2021-06-05 23:00:14,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:14,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:14,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:14,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:14,377 INFO L87 Difference]: Start difference. First operand 230 states and 550 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:15,743 INFO L93 Difference]: Finished difference Result 676 states and 1412 transitions. [2021-06-05 23:00:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:00:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:15,745 INFO L225 Difference]: With dead ends: 676 [2021-06-05 23:00:15,745 INFO L226 Difference]: Without dead ends: 635 [2021-06-05 23:00:15,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1120.4ms TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:00:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-05 23:00:15,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 344. [2021-06-05 23:00:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.498542274052478) internal successors, (857), 343 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 857 transitions. [2021-06-05 23:00:15,756 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 857 transitions. Word has length 25 [2021-06-05 23:00:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:15,756 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 857 transitions. [2021-06-05 23:00:15,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 857 transitions. [2021-06-05 23:00:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:15,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:15,757 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:15,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:15,970 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1390949779, now seen corresponding path program 29 times [2021-06-05 23:00:15,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:15,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064580361] [2021-06-05 23:00:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:16,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:16,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064580361] [2021-06-05 23:00:16,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064580361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:16,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380478318] [2021-06-05 23:00:16,080 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:16,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:00:16,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:16,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:16,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:16,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380478318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:16,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:16,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:16,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212679623] [2021-06-05 23:00:16,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:16,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:16,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:16,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:16,393 INFO L87 Difference]: Start difference. First operand 344 states and 857 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:17,708 INFO L93 Difference]: Finished difference Result 642 states and 1345 transitions. [2021-06-05 23:00:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:00:17,708 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:17,710 INFO L225 Difference]: With dead ends: 642 [2021-06-05 23:00:17,710 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 23:00:17,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1129.6ms TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:00:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 23:00:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 305. [2021-06-05 23:00:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.4309210526315788) internal successors, (739), 304 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 739 transitions. [2021-06-05 23:00:17,718 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 739 transitions. Word has length 25 [2021-06-05 23:00:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:17,718 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 739 transitions. [2021-06-05 23:00:17,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 739 transitions. [2021-06-05 23:00:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:17,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:17,719 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:17,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:00:17,937 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash -669910023, now seen corresponding path program 30 times [2021-06-05 23:00:17,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:17,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741650663] [2021-06-05 23:00:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:18,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741650663] [2021-06-05 23:00:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741650663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172133297] [2021-06-05 23:00:18,046 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:18,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:00:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:18,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:18,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172133297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:18,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:18,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:18,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331452342] [2021-06-05 23:00:18,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:18,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:18,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:18,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:18,284 INFO L87 Difference]: Start difference. First operand 305 states and 739 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:19,084 INFO L93 Difference]: Finished difference Result 433 states and 956 transitions. [2021-06-05 23:00:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:00:19,084 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:19,085 INFO L225 Difference]: With dead ends: 433 [2021-06-05 23:00:19,085 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 23:00:19,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 707.6ms TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:00:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 23:00:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-06-05 23:00:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.4372881355932203) internal successors, (719), 295 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 719 transitions. [2021-06-05 23:00:19,092 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 719 transitions. Word has length 25 [2021-06-05 23:00:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:19,092 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 719 transitions. [2021-06-05 23:00:19,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 719 transitions. [2021-06-05 23:00:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:19,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:19,093 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:19,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:19,313 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:19,313 INFO L82 PathProgramCache]: Analyzing trace with hash -271811723, now seen corresponding path program 31 times [2021-06-05 23:00:19,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:19,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287729280] [2021-06-05 23:00:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:19,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:19,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287729280] [2021-06-05 23:00:19,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287729280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:19,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425228435] [2021-06-05 23:00:19,420 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:19,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425228435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:19,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:19,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:19,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870363842] [2021-06-05 23:00:19,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:19,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:19,710 INFO L87 Difference]: Start difference. First operand 296 states and 719 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:21,171 INFO L93 Difference]: Finished difference Result 836 states and 1776 transitions. [2021-06-05 23:00:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:00:21,172 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:21,174 INFO L225 Difference]: With dead ends: 836 [2021-06-05 23:00:21,174 INFO L226 Difference]: Without dead ends: 792 [2021-06-05 23:00:21,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1336.3ms TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:00:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-05 23:00:21,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 410. [2021-06-05 23:00:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.5623471882640585) internal successors, (1048), 409 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1048 transitions. [2021-06-05 23:00:21,185 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1048 transitions. Word has length 25 [2021-06-05 23:00:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:21,185 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1048 transitions. [2021-06-05 23:00:21,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1048 transitions. [2021-06-05 23:00:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:21,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:21,187 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:21,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:00:21,393 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:21,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:21,393 INFO L82 PathProgramCache]: Analyzing trace with hash 378257247, now seen corresponding path program 32 times [2021-06-05 23:00:21,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:21,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919936080] [2021-06-05 23:00:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:21,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919936080] [2021-06-05 23:00:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919936080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546312898] [2021-06-05 23:00:21,493 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:21,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:21,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:21,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:21,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:21,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546312898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:21,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:21,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:21,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815006793] [2021-06-05 23:00:21,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:21,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:21,771 INFO L87 Difference]: Start difference. First operand 410 states and 1048 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:23,295 INFO L93 Difference]: Finished difference Result 801 states and 1700 transitions. [2021-06-05 23:00:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:00:23,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:23,297 INFO L225 Difference]: With dead ends: 801 [2021-06-05 23:00:23,297 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 23:00:23,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1425.3ms TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:00:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 23:00:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 300. [2021-06-05 23:00:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.5050167224080266) internal successors, (749), 299 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 749 transitions. [2021-06-05 23:00:23,306 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 749 transitions. Word has length 25 [2021-06-05 23:00:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:23,306 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 749 transitions. [2021-06-05 23:00:23,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 749 transitions. [2021-06-05 23:00:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:23,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:23,307 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:23,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 23:00:23,521 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1682602555, now seen corresponding path program 33 times [2021-06-05 23:00:23,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:23,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53381416] [2021-06-05 23:00:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:23,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:23,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53381416] [2021-06-05 23:00:23,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53381416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:23,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078017588] [2021-06-05 23:00:23,641 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:23,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:00:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:23,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:23,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078017588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:23,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:23,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:23,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622018623] [2021-06-05 23:00:23,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:23,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:23,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:23,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:23,896 INFO L87 Difference]: Start difference. First operand 300 states and 749 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:24,925 INFO L93 Difference]: Finished difference Result 499 states and 1080 transitions. [2021-06-05 23:00:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:00:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:24,927 INFO L225 Difference]: With dead ends: 499 [2021-06-05 23:00:24,927 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 23:00:24,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 971.0ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:00:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 23:00:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2021-06-05 23:00:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.5187713310580206) internal successors, (738), 293 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 738 transitions. [2021-06-05 23:00:24,933 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 738 transitions. Word has length 25 [2021-06-05 23:00:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:24,933 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 738 transitions. [2021-06-05 23:00:24,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 738 transitions. [2021-06-05 23:00:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:24,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:24,934 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:25,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:00:25,148 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 34 times [2021-06-05 23:00:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:25,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145182866] [2021-06-05 23:00:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:25,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:25,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145182866] [2021-06-05 23:00:25,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145182866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:25,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364675215] [2021-06-05 23:00:25,255 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:25,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:25,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:25,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:25,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364675215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:25,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:25,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:25,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497231125] [2021-06-05 23:00:25,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:25,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:25,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:25,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:25,509 INFO L87 Difference]: Start difference. First operand 294 states and 738 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:26,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:26,265 INFO L93 Difference]: Finished difference Result 435 states and 957 transitions. [2021-06-05 23:00:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:00:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:26,266 INFO L225 Difference]: With dead ends: 435 [2021-06-05 23:00:26,266 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 23:00:26,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 746.5ms TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:00:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 23:00:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 286. [2021-06-05 23:00:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.389473684210526) internal successors, (681), 285 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 681 transitions. [2021-06-05 23:00:26,271 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 681 transitions. Word has length 25 [2021-06-05 23:00:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:26,271 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 681 transitions. [2021-06-05 23:00:26,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 681 transitions. [2021-06-05 23:00:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:26,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:26,272 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:26,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 23:00:26,485 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2090603063, now seen corresponding path program 35 times [2021-06-05 23:00:26,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:26,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120264984] [2021-06-05 23:00:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:26,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:26,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120264984] [2021-06-05 23:00:26,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120264984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:26,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951205348] [2021-06-05 23:00:26,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:26,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:00:26,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:26,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:26,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:26,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951205348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:26,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:26,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:26,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171834890] [2021-06-05 23:00:26,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:26,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:26,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:26,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:26,904 INFO L87 Difference]: Start difference. First operand 286 states and 681 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:27,857 INFO L93 Difference]: Finished difference Result 526 states and 1119 transitions. [2021-06-05 23:00:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:00:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:27,859 INFO L225 Difference]: With dead ends: 526 [2021-06-05 23:00:27,859 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 23:00:27,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 938.2ms TimeCoverageRelationStatistics Valid=403, Invalid=2789, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:00:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 23:00:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-06-05 23:00:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.3015384615384615) internal successors, (748), 325 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 748 transitions. [2021-06-05 23:00:27,865 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 748 transitions. Word has length 25 [2021-06-05 23:00:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:27,865 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 748 transitions. [2021-06-05 23:00:27,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 748 transitions. [2021-06-05 23:00:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:27,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:27,866 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:28,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:28,085 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1554295263, now seen corresponding path program 36 times [2021-06-05 23:00:28,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:28,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019612940] [2021-06-05 23:00:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:28,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:28,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019612940] [2021-06-05 23:00:28,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019612940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:28,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258313871] [2021-06-05 23:00:28,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:28,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:00:28,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:28,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:28,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:28,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258313871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:28,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:28,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:28,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006022013] [2021-06-05 23:00:28,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:28,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:28,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:28,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:28,476 INFO L87 Difference]: Start difference. First operand 326 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:29,355 INFO L93 Difference]: Finished difference Result 471 states and 986 transitions. [2021-06-05 23:00:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:00:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:29,356 INFO L225 Difference]: With dead ends: 471 [2021-06-05 23:00:29,356 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 23:00:29,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 866.4ms TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:00:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 23:00:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 285. [2021-06-05 23:00:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.3204225352112675) internal successors, (659), 284 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 659 transitions. [2021-06-05 23:00:29,360 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 659 transitions. Word has length 25 [2021-06-05 23:00:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:29,361 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 659 transitions. [2021-06-05 23:00:29,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 659 transitions. [2021-06-05 23:00:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:29,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:29,361 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:29,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 23:00:29,567 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:29,568 INFO L82 PathProgramCache]: Analyzing trace with hash 679812231, now seen corresponding path program 37 times [2021-06-05 23:00:29,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:29,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493244170] [2021-06-05 23:00:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:29,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493244170] [2021-06-05 23:00:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493244170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224969378] [2021-06-05 23:00:29,702 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:29,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:29,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224969378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:29,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:29,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:29,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984420755] [2021-06-05 23:00:29,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:29,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:29,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:29,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:29,980 INFO L87 Difference]: Start difference. First operand 285 states and 659 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:30,541 INFO L93 Difference]: Finished difference Result 371 states and 801 transitions. [2021-06-05 23:00:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:00:30,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:30,543 INFO L225 Difference]: With dead ends: 371 [2021-06-05 23:00:30,543 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 23:00:30,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 658.7ms TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:00:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 23:00:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 289. [2021-06-05 23:00:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3194444444444446) internal successors, (668), 288 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 668 transitions. [2021-06-05 23:00:30,548 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 668 transitions. Word has length 25 [2021-06-05 23:00:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:30,548 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 668 transitions. [2021-06-05 23:00:30,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 668 transitions. [2021-06-05 23:00:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:30,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:30,549 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:30,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 23:00:30,753 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash -332880301, now seen corresponding path program 38 times [2021-06-05 23:00:30,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:30,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980563788] [2021-06-05 23:00:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:30,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:30,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980563788] [2021-06-05 23:00:30,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980563788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:30,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269098920] [2021-06-05 23:00:30,866 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:30,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:30,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:30,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:30,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:31,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269098920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:31,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:31,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:31,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054852475] [2021-06-05 23:00:31,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:31,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:31,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:31,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:31,154 INFO L87 Difference]: Start difference. First operand 289 states and 668 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:31,987 INFO L93 Difference]: Finished difference Result 434 states and 912 transitions. [2021-06-05 23:00:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:00:31,988 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:31,989 INFO L225 Difference]: With dead ends: 434 [2021-06-05 23:00:31,989 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 23:00:31,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 874.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:00:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 23:00:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 289. [2021-06-05 23:00:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3229166666666665) internal successors, (669), 288 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 669 transitions. [2021-06-05 23:00:31,995 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 669 transitions. Word has length 25 [2021-06-05 23:00:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:31,995 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 669 transitions. [2021-06-05 23:00:31,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 669 transitions. [2021-06-05 23:00:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:31,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:31,996 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:32,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:32,213 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:32,213 INFO L82 PathProgramCache]: Analyzing trace with hash -868110103, now seen corresponding path program 39 times [2021-06-05 23:00:32,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:32,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288574976] [2021-06-05 23:00:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:32,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288574976] [2021-06-05 23:00:32,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288574976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186057813] [2021-06-05 23:00:32,313 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:32,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:00:32,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:32,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:32,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186057813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:32,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:32,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:00:32,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449702894] [2021-06-05 23:00:32,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:32,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:32,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:32,574 INFO L87 Difference]: Start difference. First operand 289 states and 669 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:33,280 INFO L93 Difference]: Finished difference Result 408 states and 870 transitions. [2021-06-05 23:00:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:00:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:33,281 INFO L225 Difference]: With dead ends: 408 [2021-06-05 23:00:33,281 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 23:00:33,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 692.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:00:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 23:00:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 281. [2021-06-05 23:00:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.307142857142857) internal successors, (646), 280 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 646 transitions. [2021-06-05 23:00:33,286 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 646 transitions. Word has length 25 [2021-06-05 23:00:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:33,287 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 646 transitions. [2021-06-05 23:00:33,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 646 transitions. [2021-06-05 23:00:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:33,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:33,287 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:33,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 23:00:33,501 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1839386049, now seen corresponding path program 40 times [2021-06-05 23:00:33,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:33,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896439931] [2021-06-05 23:00:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:33,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:33,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896439931] [2021-06-05 23:00:33,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896439931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:33,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886579223] [2021-06-05 23:00:33,729 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:33,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:33,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:33,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:33,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:34,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886579223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:34,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:34,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:00:34,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555345940] [2021-06-05 23:00:34,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:34,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:34,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:34,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:34,070 INFO L87 Difference]: Start difference. First operand 281 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:36,242 INFO L93 Difference]: Finished difference Result 487 states and 1044 transitions. [2021-06-05 23:00:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:00:36,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:36,243 INFO L225 Difference]: With dead ends: 487 [2021-06-05 23:00:36,243 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 23:00:36,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2157.2ms TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:00:36,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 23:00:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 299. [2021-06-05 23:00:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.291946308724832) internal successors, (683), 298 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 683 transitions. [2021-06-05 23:00:36,247 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 683 transitions. Word has length 25 [2021-06-05 23:00:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:36,248 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 683 transitions. [2021-06-05 23:00:36,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 683 transitions. [2021-06-05 23:00:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:36,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:36,248 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:36,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:36,449 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1319395975, now seen corresponding path program 41 times [2021-06-05 23:00:36,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:36,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048021460] [2021-06-05 23:00:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:36,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:36,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048021460] [2021-06-05 23:00:36,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048021460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:36,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957691706] [2021-06-05 23:00:36,627 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:36,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:00:36,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:36,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:00:36,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:36,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957691706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:36,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:36,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:00:36,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558666781] [2021-06-05 23:00:36,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:00:36,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:36,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:00:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:00:36,950 INFO L87 Difference]: Start difference. First operand 299 states and 683 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:39,315 INFO L93 Difference]: Finished difference Result 516 states and 1115 transitions. [2021-06-05 23:00:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:00:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:39,317 INFO L225 Difference]: With dead ends: 516 [2021-06-05 23:00:39,317 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 23:00:39,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2236.0ms TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:00:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 23:00:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 301. [2021-06-05 23:00:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3) internal successors, (690), 300 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 690 transitions. [2021-06-05 23:00:39,322 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 690 transitions. Word has length 25 [2021-06-05 23:00:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:39,323 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 690 transitions. [2021-06-05 23:00:39,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 690 transitions. [2021-06-05 23:00:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:39,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:39,323 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:39,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 23:00:39,546 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:39,546 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 42 times [2021-06-05 23:00:39,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:39,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197069495] [2021-06-05 23:00:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:39,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197069495] [2021-06-05 23:00:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197069495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391596902] [2021-06-05 23:00:39,747 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:39,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:00:39,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:39,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:00:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:40,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391596902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:40,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:40,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:00:40,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251913885] [2021-06-05 23:00:40,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:00:40,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:00:40,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:00:40,054 INFO L87 Difference]: Start difference. First operand 301 states and 690 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:41,108 INFO L93 Difference]: Finished difference Result 558 states and 1181 transitions. [2021-06-05 23:00:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:00:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:41,110 INFO L225 Difference]: With dead ends: 558 [2021-06-05 23:00:41,110 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 23:00:41,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1181.4ms TimeCoverageRelationStatistics Valid=566, Invalid=3724, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:00:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 23:00:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 367. [2021-06-05 23:00:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.3524590163934427) internal successors, (861), 366 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 861 transitions. [2021-06-05 23:00:41,117 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 861 transitions. Word has length 27 [2021-06-05 23:00:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:41,117 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 861 transitions. [2021-06-05 23:00:41,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:41,117 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 861 transitions. [2021-06-05 23:00:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:41,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:41,118 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:41,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:41,333 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:41,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1087323029, now seen corresponding path program 43 times [2021-06-05 23:00:41,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:41,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980968137] [2021-06-05 23:00:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:41,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980968137] [2021-06-05 23:00:41,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980968137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613502356] [2021-06-05 23:00:41,478 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:41,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:00:41,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:41,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613502356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:41,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:41,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:00:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595830197] [2021-06-05 23:00:41,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:41,786 INFO L87 Difference]: Start difference. First operand 367 states and 861 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:42,975 INFO L93 Difference]: Finished difference Result 582 states and 1226 transitions. [2021-06-05 23:00:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:00:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:42,977 INFO L225 Difference]: With dead ends: 582 [2021-06-05 23:00:42,977 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 23:00:42,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1177.9ms TimeCoverageRelationStatistics Valid=636, Invalid=4194, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:00:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 23:00:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 370. [2021-06-05 23:00:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.3495934959349594) internal successors, (867), 369 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 867 transitions. [2021-06-05 23:00:42,984 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 867 transitions. Word has length 27 [2021-06-05 23:00:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:42,984 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 867 transitions. [2021-06-05 23:00:42,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 867 transitions. [2021-06-05 23:00:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:42,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:42,985 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:43,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:00:43,201 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash -254898513, now seen corresponding path program 44 times [2021-06-05 23:00:43,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:43,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519624320] [2021-06-05 23:00:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:43,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:43,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519624320] [2021-06-05 23:00:43,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519624320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:43,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749503352] [2021-06-05 23:00:43,379 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:43,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:43,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:43,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:00:43,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:43,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749503352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:43,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:43,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:00:43,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533374043] [2021-06-05 23:00:43,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:43,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:43,661 INFO L87 Difference]: Start difference. First operand 370 states and 867 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:45,252 INFO L93 Difference]: Finished difference Result 675 states and 1384 transitions. [2021-06-05 23:00:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:00:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:45,254 INFO L225 Difference]: With dead ends: 675 [2021-06-05 23:00:45,254 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 23:00:45,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1369.0ms TimeCoverageRelationStatistics Valid=733, Invalid=4817, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:00:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 23:00:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 376. [2021-06-05 23:00:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.3573333333333335) internal successors, (884), 375 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 884 transitions. [2021-06-05 23:00:45,260 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 884 transitions. Word has length 27 [2021-06-05 23:00:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:45,260 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 884 transitions. [2021-06-05 23:00:45,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 884 transitions. [2021-06-05 23:00:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:45,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:45,261 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:45,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 23:00:45,469 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1519826373, now seen corresponding path program 45 times [2021-06-05 23:00:45,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:45,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154984599] [2021-06-05 23:00:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:45,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:45,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154984599] [2021-06-05 23:00:45,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154984599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:45,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141656072] [2021-06-05 23:00:45,675 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:45,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:00:45,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:45,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:00:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:46,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141656072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:46,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:46,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:00:46,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829117088] [2021-06-05 23:00:46,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:46,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:46,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:46,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:46,057 INFO L87 Difference]: Start difference. First operand 376 states and 884 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:47,633 INFO L93 Difference]: Finished difference Result 647 states and 1333 transitions. [2021-06-05 23:00:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:00:47,633 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:47,635 INFO L225 Difference]: With dead ends: 647 [2021-06-05 23:00:47,635 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 23:00:47,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 1527.6ms TimeCoverageRelationStatistics Valid=718, Invalid=4684, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:00:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 23:00:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 389. [2021-06-05 23:00:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.3556701030927836) internal successors, (914), 388 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 914 transitions. [2021-06-05 23:00:47,642 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 914 transitions. Word has length 27 [2021-06-05 23:00:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:47,643 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 914 transitions. [2021-06-05 23:00:47,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:47,643 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 914 transitions. [2021-06-05 23:00:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:47,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:47,644 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:47,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:47,853 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:47,853 INFO L82 PathProgramCache]: Analyzing trace with hash -383641101, now seen corresponding path program 46 times [2021-06-05 23:00:47,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:47,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278583177] [2021-06-05 23:00:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:48,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:48,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278583177] [2021-06-05 23:00:48,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278583177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:48,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945435815] [2021-06-05 23:00:48,062 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:48,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:48,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:00:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:48,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945435815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:48,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:48,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:00:48,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987265134] [2021-06-05 23:00:48,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:48,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:48,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:48,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:48,385 INFO L87 Difference]: Start difference. First operand 389 states and 914 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:49,852 INFO L93 Difference]: Finished difference Result 665 states and 1367 transitions. [2021-06-05 23:00:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:00:49,852 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:49,854 INFO L225 Difference]: With dead ends: 665 [2021-06-05 23:00:49,854 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 23:00:49,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1381.9ms TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:00:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 23:00:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 390. [2021-06-05 23:00:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3573264781491003) internal successors, (917), 389 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 917 transitions. [2021-06-05 23:00:49,860 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 917 transitions. Word has length 27 [2021-06-05 23:00:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:49,860 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 917 transitions. [2021-06-05 23:00:49,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 917 transitions. [2021-06-05 23:00:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:49,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:49,861 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:50,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:00:50,061 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:50,062 INFO L82 PathProgramCache]: Analyzing trace with hash 266427869, now seen corresponding path program 47 times [2021-06-05 23:00:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:50,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193280316] [2021-06-05 23:00:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:50,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:50,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193280316] [2021-06-05 23:00:50,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193280316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:50,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027475909] [2021-06-05 23:00:50,231 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:50,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:00:50,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:50,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:00:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:50,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027475909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:50,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:50,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:00:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991290923] [2021-06-05 23:00:50,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:50,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:50,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:50,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:50,641 INFO L87 Difference]: Start difference. First operand 390 states and 917 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:52,722 INFO L93 Difference]: Finished difference Result 729 states and 1539 transitions. [2021-06-05 23:00:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:00:52,722 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:52,724 INFO L225 Difference]: With dead ends: 729 [2021-06-05 23:00:52,724 INFO L226 Difference]: Without dead ends: 699 [2021-06-05 23:00:52,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1968.0ms TimeCoverageRelationStatistics Valid=949, Invalid=5857, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:00:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-05 23:00:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 414. [2021-06-05 23:00:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.358353510895884) internal successors, (974), 413 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 974 transitions. [2021-06-05 23:00:52,731 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 974 transitions. Word has length 27 [2021-06-05 23:00:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:52,731 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 974 transitions. [2021-06-05 23:00:52,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 974 transitions. [2021-06-05 23:00:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:52,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:52,732 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:52,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:52,937 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash 209025461, now seen corresponding path program 48 times [2021-06-05 23:00:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221094783] [2021-06-05 23:00:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:53,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221094783] [2021-06-05 23:00:53,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221094783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726002308] [2021-06-05 23:00:53,082 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:53,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:00:53,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:53,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:00:53,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:53,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726002308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:53,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:53,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:00:53,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55859857] [2021-06-05 23:00:53,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:53,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:53,352 INFO L87 Difference]: Start difference. First operand 414 states and 974 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:55,291 INFO L93 Difference]: Finished difference Result 787 states and 1650 transitions. [2021-06-05 23:00:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:00:55,291 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:55,293 INFO L225 Difference]: With dead ends: 787 [2021-06-05 23:00:55,293 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 23:00:55,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 1806.9ms TimeCoverageRelationStatistics Valid=917, Invalid=5563, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:00:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 23:00:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 468. [2021-06-05 23:00:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.3618843683083512) internal successors, (1103), 467 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1103 transitions. [2021-06-05 23:00:55,306 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1103 transitions. Word has length 27 [2021-06-05 23:00:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:55,306 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1103 transitions. [2021-06-05 23:00:55,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1103 transitions. [2021-06-05 23:00:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:55,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:55,307 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:55,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 23:00:55,525 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:55,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1055902399, now seen corresponding path program 49 times [2021-06-05 23:00:55,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:55,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934143122] [2021-06-05 23:00:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:55,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:55,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934143122] [2021-06-05 23:00:55,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934143122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:55,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645380191] [2021-06-05 23:00:55,692 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:55,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:00:55,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:55,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645380191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:55,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:55,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:00:55,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109193631] [2021-06-05 23:00:55,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:55,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:55,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:55,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:55,960 INFO L87 Difference]: Start difference. First operand 468 states and 1103 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:57,143 INFO L93 Difference]: Finished difference Result 716 states and 1520 transitions. [2021-06-05 23:00:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:00:57,144 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:57,146 INFO L225 Difference]: With dead ends: 716 [2021-06-05 23:00:57,146 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 23:00:57,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1180.1ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:00:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 23:00:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 461. [2021-06-05 23:00:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.3304347826086955) internal successors, (1072), 460 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1072 transitions. [2021-06-05 23:00:57,152 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1072 transitions. Word has length 27 [2021-06-05 23:00:57,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:57,152 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1072 transitions. [2021-06-05 23:00:57,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1072 transitions. [2021-06-05 23:00:57,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:57,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:57,153 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:57,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 23:00:57,353 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:57,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1174374461, now seen corresponding path program 50 times [2021-06-05 23:00:57,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:57,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028905188] [2021-06-05 23:00:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:57,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028905188] [2021-06-05 23:00:57,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028905188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425267989] [2021-06-05 23:00:57,517 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:57,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:57,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:57,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:00:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:57,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425267989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:57,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:57,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:00:57,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664336987] [2021-06-05 23:00:57,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:57,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:57,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:57,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:57,833 INFO L87 Difference]: Start difference. First operand 461 states and 1072 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:59,340 INFO L93 Difference]: Finished difference Result 711 states and 1531 transitions. [2021-06-05 23:00:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:00:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:00:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:59,342 INFO L225 Difference]: With dead ends: 711 [2021-06-05 23:00:59,342 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 23:00:59,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1416.6ms TimeCoverageRelationStatistics Valid=712, Invalid=3710, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:00:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 23:00:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 484. [2021-06-05 23:00:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.3064182194616976) internal successors, (1114), 483 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1114 transitions. [2021-06-05 23:00:59,349 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1114 transitions. Word has length 27 [2021-06-05 23:00:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:59,349 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1114 transitions. [2021-06-05 23:00:59,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1114 transitions. [2021-06-05 23:00:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:00:59,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:59,350 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:59,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 23:00:59,565 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:59,566 INFO L82 PathProgramCache]: Analyzing trace with hash -52082337, now seen corresponding path program 51 times [2021-06-05 23:00:59,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:59,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859834417] [2021-06-05 23:00:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:59,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:59,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859834417] [2021-06-05 23:00:59,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859834417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:59,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757206136] [2021-06-05 23:00:59,711 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:59,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:00:59,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:59,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:00:59,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:00,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757206136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:00,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:00,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 23:01:00,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142787984] [2021-06-05 23:01:00,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:01:00,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:01:00,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:01:00,038 INFO L87 Difference]: Start difference. First operand 484 states and 1114 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:01,281 INFO L93 Difference]: Finished difference Result 697 states and 1499 transitions. [2021-06-05 23:01:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:01:01,282 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:01:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:01,284 INFO L225 Difference]: With dead ends: 697 [2021-06-05 23:01:01,284 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 23:01:01,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1180.2ms TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:01:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 23:01:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 448. [2021-06-05 23:01:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.250559284116331) internal successors, (1006), 447 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1006 transitions. [2021-06-05 23:01:01,292 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1006 transitions. Word has length 27 [2021-06-05 23:01:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:01,292 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1006 transitions. [2021-06-05 23:01:01,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1006 transitions. [2021-06-05 23:01:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:01:01,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:01,293 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:01,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:01:01,497 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2112942139, now seen corresponding path program 52 times [2021-06-05 23:01:01,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:01,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841983808] [2021-06-05 23:01:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:01,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:01,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841983808] [2021-06-05 23:01:01,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841983808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:01,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030728344] [2021-06-05 23:01:01,606 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:01,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:01,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:01,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:01:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:01,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030728344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:01,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:01,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 23:01:01,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792214768] [2021-06-05 23:01:01,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:01:01,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:01:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:01:01,905 INFO L87 Difference]: Start difference. First operand 448 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:02,687 INFO L93 Difference]: Finished difference Result 644 states and 1380 transitions. [2021-06-05 23:01:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:01:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:01:02,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:02,689 INFO L225 Difference]: With dead ends: 644 [2021-06-05 23:01:02,689 INFO L226 Difference]: Without dead ends: 630 [2021-06-05 23:01:02,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 831.4ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:01:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-05 23:01:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 493. [2021-06-05 23:01:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.252032520325203) internal successors, (1108), 492 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1108 transitions. [2021-06-05 23:01:02,696 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1108 transitions. Word has length 27 [2021-06-05 23:01:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:02,696 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1108 transitions. [2021-06-05 23:01:02,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1108 transitions. [2021-06-05 23:01:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:01:02,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:02,697 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:02,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:02,897 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1169332625, now seen corresponding path program 53 times [2021-06-05 23:01:02,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:02,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212026205] [2021-06-05 23:01:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:03,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:03,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212026205] [2021-06-05 23:01:03,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212026205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:03,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345107690] [2021-06-05 23:01:03,014 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:03,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:01:03,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:03,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:01:03,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:03,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345107690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:03,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:03,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 23:01:03,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409560744] [2021-06-05 23:01:03,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:01:03,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:01:03,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:01:03,290 INFO L87 Difference]: Start difference. First operand 493 states and 1108 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:04,207 INFO L93 Difference]: Finished difference Result 666 states and 1417 transitions. [2021-06-05 23:01:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:01:04,207 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:01:04,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:04,208 INFO L225 Difference]: With dead ends: 666 [2021-06-05 23:01:04,209 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 23:01:04,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 925.5ms TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:01:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 23:01:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 451. [2021-06-05 23:01:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 2.2355555555555555) internal successors, (1006), 450 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1006 transitions. [2021-06-05 23:01:04,216 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1006 transitions. Word has length 27 [2021-06-05 23:01:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:04,216 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1006 transitions. [2021-06-05 23:01:04,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1006 transitions. [2021-06-05 23:01:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:01:04,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:04,216 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:04,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 23:01:04,417 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash 634102823, now seen corresponding path program 54 times [2021-06-05 23:01:04,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:04,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270026558] [2021-06-05 23:01:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:04,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:04,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270026558] [2021-06-05 23:01:04,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270026558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:04,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730269472] [2021-06-05 23:01:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:04,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:01:04,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:04,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:01:04,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:04,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730269472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:04,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:04,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 23:01:04,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141823841] [2021-06-05 23:01:04,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:01:04,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:04,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:01:04,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:01:04,784 INFO L87 Difference]: Start difference. First operand 451 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:05,394 INFO L93 Difference]: Finished difference Result 558 states and 1193 transitions. [2021-06-05 23:01:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:01:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:01:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:05,396 INFO L225 Difference]: With dead ends: 558 [2021-06-05 23:01:05,396 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 23:01:05,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:01:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 23:01:05,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 427. [2021-06-05 23:01:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.1338028169014085) internal successors, (909), 426 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 909 transitions. [2021-06-05 23:01:05,400 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 909 transitions. Word has length 27 [2021-06-05 23:01:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:05,400 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 909 transitions. [2021-06-05 23:01:05,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 909 transitions. [2021-06-05 23:01:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:01:05,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:05,401 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:05,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:05,602 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:05,602 INFO L82 PathProgramCache]: Analyzing trace with hash 177512313, now seen corresponding path program 55 times [2021-06-05 23:01:05,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:05,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830655963] [2021-06-05 23:01:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:05,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:05,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830655963] [2021-06-05 23:01:05,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830655963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613862122] [2021-06-05 23:01:05,776 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:05,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:01:05,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:06,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613862122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:06,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:06,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 23:01:06,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29903188] [2021-06-05 23:01:06,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:01:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:01:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:01:06,081 INFO L87 Difference]: Start difference. First operand 427 states and 909 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:07,675 INFO L93 Difference]: Finished difference Result 575 states and 1167 transitions. [2021-06-05 23:01:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:01:07,675 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:01:07,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:07,676 INFO L225 Difference]: With dead ends: 575 [2021-06-05 23:01:07,677 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 23:01:07,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1539.8ms TimeCoverageRelationStatistics Valid=739, Invalid=4091, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:01:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 23:01:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 341. [2021-06-05 23:01:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.126470588235294) internal successors, (723), 340 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 723 transitions. [2021-06-05 23:01:07,682 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 723 transitions. Word has length 27 [2021-06-05 23:01:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:07,682 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 723 transitions. [2021-06-05 23:01:07,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 723 transitions. [2021-06-05 23:01:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:01:07,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:07,682 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:07,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:07,893 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:07,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1680806143, now seen corresponding path program 56 times [2021-06-05 23:01:07,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:07,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870766807] [2021-06-05 23:01:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:01:07,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:07,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870766807] [2021-06-05 23:01:07,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870766807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:07,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482785803] [2021-06-05 23:01:07,928 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:07,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:07,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:01:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:01:07,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482785803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:07,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:07,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 23:01:07,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955642970] [2021-06-05 23:01:07,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:01:07,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:01:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:01:07,997 INFO L87 Difference]: Start difference. First operand 341 states and 723 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:08,053 INFO L93 Difference]: Finished difference Result 501 states and 1034 transitions. [2021-06-05 23:01:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:01:08,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:01:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:08,055 INFO L225 Difference]: With dead ends: 501 [2021-06-05 23:01:08,055 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 23:01:08,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:01:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 23:01:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 314. [2021-06-05 23:01:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.121405750798722) internal successors, (664), 313 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 664 transitions. [2021-06-05 23:01:08,059 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 664 transitions. Word has length 27 [2021-06-05 23:01:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:08,060 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 664 transitions. [2021-06-05 23:01:08,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 664 transitions. [2021-06-05 23:01:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:08,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:08,060 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:08,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:08,277 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1310861107, now seen corresponding path program 57 times [2021-06-05 23:01:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376707330] [2021-06-05 23:01:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:08,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:08,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376707330] [2021-06-05 23:01:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376707330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:08,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657216893] [2021-06-05 23:01:08,448 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:08,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:01:08,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:08,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:01:08,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:08,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657216893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:08,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:08,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:01:08,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142562817] [2021-06-05 23:01:08,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:01:08,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:01:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:01:08,817 INFO L87 Difference]: Start difference. First operand 314 states and 664 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:09,900 INFO L93 Difference]: Finished difference Result 613 states and 1226 transitions. [2021-06-05 23:01:09,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:01:09,901 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:09,902 INFO L225 Difference]: With dead ends: 613 [2021-06-05 23:01:09,902 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 23:01:09,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:01:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 23:01:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 333. [2021-06-05 23:01:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.1204819277108435) internal successors, (704), 332 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 704 transitions. [2021-06-05 23:01:09,906 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 704 transitions. Word has length 29 [2021-06-05 23:01:09,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:09,906 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 704 transitions. [2021-06-05 23:01:09,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 704 transitions. [2021-06-05 23:01:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:09,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:09,907 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:10,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:10,107 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash 75290793, now seen corresponding path program 58 times [2021-06-05 23:01:10,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:10,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712244727] [2021-06-05 23:01:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:10,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712244727] [2021-06-05 23:01:10,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712244727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986223578] [2021-06-05 23:01:10,223 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:10,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:10,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:01:10,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:10,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986223578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:10,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:10,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 23:01:10,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578866077] [2021-06-05 23:01:10,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:01:10,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:10,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:01:10,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:01:10,565 INFO L87 Difference]: Start difference. First operand 333 states and 704 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:12,250 INFO L93 Difference]: Finished difference Result 809 states and 1602 transitions. [2021-06-05 23:01:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:01:12,251 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:12,252 INFO L225 Difference]: With dead ends: 809 [2021-06-05 23:01:12,252 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 23:01:12,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1459.2ms TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:01:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 23:01:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 437. [2021-06-05 23:01:12,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.1376146788990824) internal successors, (932), 436 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 932 transitions. [2021-06-05 23:01:12,258 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 932 transitions. Word has length 29 [2021-06-05 23:01:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:12,258 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 932 transitions. [2021-06-05 23:01:12,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 932 transitions. [2021-06-05 23:01:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:12,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:12,259 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:12,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 23:01:12,459 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash -937401739, now seen corresponding path program 59 times [2021-06-05 23:01:12,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:12,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445280973] [2021-06-05 23:01:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:12,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:12,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445280973] [2021-06-05 23:01:12,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445280973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:12,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900187846] [2021-06-05 23:01:12,595 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:12,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:01:12,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:12,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:01:12,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:12,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900187846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:12,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:12,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 23:01:12,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920818229] [2021-06-05 23:01:12,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:01:12,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:12,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:01:12,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:01:12,941 INFO L87 Difference]: Start difference. First operand 437 states and 932 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:15,069 INFO L93 Difference]: Finished difference Result 994 states and 1975 transitions. [2021-06-05 23:01:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 23:01:15,069 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:15,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:15,070 INFO L225 Difference]: With dead ends: 994 [2021-06-05 23:01:15,070 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 23:01:15,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 1885.7ms TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:01:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 23:01:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 420. [2021-06-05 23:01:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.1408114558472553) internal successors, (897), 419 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 897 transitions. [2021-06-05 23:01:15,077 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 897 transitions. Word has length 29 [2021-06-05 23:01:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:15,077 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 897 transitions. [2021-06-05 23:01:15,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 897 transitions. [2021-06-05 23:01:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:15,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:15,077 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:15,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:15,278 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:15,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1615340429, now seen corresponding path program 60 times [2021-06-05 23:01:15,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:15,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860964408] [2021-06-05 23:01:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:15,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860964408] [2021-06-05 23:01:15,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860964408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493194353] [2021-06-05 23:01:15,444 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:15,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:01:15,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:15,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:01:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:15,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493194353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:15,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:15,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:01:15,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191288713] [2021-06-05 23:01:15,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:01:15,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:15,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:01:15,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:01:15,794 INFO L87 Difference]: Start difference. First operand 420 states and 897 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:16,911 INFO L93 Difference]: Finished difference Result 665 states and 1331 transitions. [2021-06-05 23:01:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:01:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:16,913 INFO L225 Difference]: With dead ends: 665 [2021-06-05 23:01:16,913 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 23:01:16,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1104.5ms TimeCoverageRelationStatistics Valid=543, Invalid=3489, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:01:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 23:01:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 459. [2021-06-05 23:01:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.1397379912663754) internal successors, (980), 458 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 980 transitions. [2021-06-05 23:01:16,918 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 980 transitions. Word has length 29 [2021-06-05 23:01:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:16,918 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 980 transitions. [2021-06-05 23:01:16,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 980 transitions. [2021-06-05 23:01:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:16,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:16,919 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:17,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 23:01:17,131 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1666934335, now seen corresponding path program 61 times [2021-06-05 23:01:17,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:17,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106269417] [2021-06-05 23:01:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:17,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:17,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106269417] [2021-06-05 23:01:17,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106269417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:17,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394361207] [2021-06-05 23:01:17,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:17,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:01:17,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394361207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:17,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:17,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 23:01:17,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105411635] [2021-06-05 23:01:17,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:01:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:01:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:01:17,600 INFO L87 Difference]: Start difference. First operand 459 states and 980 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:19,172 INFO L93 Difference]: Finished difference Result 740 states and 1463 transitions. [2021-06-05 23:01:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:01:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:19,173 INFO L225 Difference]: With dead ends: 740 [2021-06-05 23:01:19,173 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 23:01:19,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 1457.5ms TimeCoverageRelationStatistics Valid=756, Invalid=5886, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 23:01:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 23:01:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 376. [2021-06-05 23:01:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.1413333333333333) internal successors, (803), 375 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 803 transitions. [2021-06-05 23:01:19,178 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 803 transitions. Word has length 29 [2021-06-05 23:01:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:19,178 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 803 transitions. [2021-06-05 23:01:19,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 803 transitions. [2021-06-05 23:01:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:19,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:19,179 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:19,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:19,379 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:19,380 INFO L82 PathProgramCache]: Analyzing trace with hash -303996619, now seen corresponding path program 62 times [2021-06-05 23:01:19,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:19,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553332873] [2021-06-05 23:01:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:19,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553332873] [2021-06-05 23:01:19,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553332873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785076332] [2021-06-05 23:01:19,615 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:19,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:19,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:01:19,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:19,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785076332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:19,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:19,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 23:01:19,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971343622] [2021-06-05 23:01:19,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:01:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:01:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:01:19,966 INFO L87 Difference]: Start difference. First operand 376 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:23,815 INFO L93 Difference]: Finished difference Result 945 states and 1899 transitions. [2021-06-05 23:01:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:01:23,815 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:23,817 INFO L225 Difference]: With dead ends: 945 [2021-06-05 23:01:23,817 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 23:01:23,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3495.9ms TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 23:01:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 23:01:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 438. [2021-06-05 23:01:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.1556064073226544) internal successors, (942), 437 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 942 transitions. [2021-06-05 23:01:23,828 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 942 transitions. Word has length 29 [2021-06-05 23:01:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:23,828 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 942 transitions. [2021-06-05 23:01:23,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 942 transitions. [2021-06-05 23:01:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:23,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:23,829 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:24,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:24,040 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash 649114413, now seen corresponding path program 63 times [2021-06-05 23:01:24,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:24,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086400685] [2021-06-05 23:01:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:24,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:24,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086400685] [2021-06-05 23:01:24,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086400685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:24,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070242213] [2021-06-05 23:01:24,273 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:24,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:01:24,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:24,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:01:24,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070242213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:24,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:24,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-06-05 23:01:24,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615355840] [2021-06-05 23:01:24,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:01:24,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:24,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:01:24,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:01:24,562 INFO L87 Difference]: Start difference. First operand 438 states and 942 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:25,599 INFO L93 Difference]: Finished difference Result 599 states and 1229 transitions. [2021-06-05 23:01:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:01:25,599 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:25,600 INFO L225 Difference]: With dead ends: 599 [2021-06-05 23:01:25,600 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 23:01:25,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1039.3ms TimeCoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:01:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 23:01:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 431. [2021-06-05 23:01:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.1372093023255814) internal successors, (919), 430 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 919 transitions. [2021-06-05 23:01:25,605 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 919 transitions. Word has length 29 [2021-06-05 23:01:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:25,606 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 919 transitions. [2021-06-05 23:01:25,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 919 transitions. [2021-06-05 23:01:25,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:25,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:25,607 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:25,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:25,821 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1614463413, now seen corresponding path program 64 times [2021-06-05 23:01:25,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:25,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924965785] [2021-06-05 23:01:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:26,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:26,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924965785] [2021-06-05 23:01:26,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924965785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:26,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211531210] [2021-06-05 23:01:26,074 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:26,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:26,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:26,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:01:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211531210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:26,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:26,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 23:01:26,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618862765] [2021-06-05 23:01:26,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:01:26,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:26,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:01:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:01:26,498 INFO L87 Difference]: Start difference. First operand 431 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:27,896 INFO L93 Difference]: Finished difference Result 661 states and 1333 transitions. [2021-06-05 23:01:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:01:27,896 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:27,897 INFO L225 Difference]: With dead ends: 661 [2021-06-05 23:01:27,897 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 23:01:27,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1484.8ms TimeCoverageRelationStatistics Valid=535, Invalid=3755, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:01:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 23:01:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 362. [2021-06-05 23:01:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-06-05 23:01:27,902 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 29 [2021-06-05 23:01:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:27,902 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-06-05 23:01:27,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-06-05 23:01:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:01:27,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:27,904 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:28,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:28,128 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash -184540877, now seen corresponding path program 65 times [2021-06-05 23:01:28,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:28,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425541925] [2021-06-05 23:01:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:28,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:28,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425541925] [2021-06-05 23:01:28,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425541925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:28,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573972011] [2021-06-05 23:01:28,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:28,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:01:28,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:28,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:01:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:28,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573972011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:28,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:28,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:01:28,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949054975] [2021-06-05 23:01:28,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:01:28,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:28,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:01:28,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:01:28,585 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:29,883 INFO L93 Difference]: Finished difference Result 586 states and 1201 transitions. [2021-06-05 23:01:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:01:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:01:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:29,884 INFO L225 Difference]: With dead ends: 586 [2021-06-05 23:01:29,884 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 23:01:29,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1270.0ms TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:01:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 23:01:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 194. [2021-06-05 23:01:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.051813471502591) internal successors, (396), 193 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 396 transitions. [2021-06-05 23:01:29,889 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 396 transitions. Word has length 29 [2021-06-05 23:01:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:29,889 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 396 transitions. [2021-06-05 23:01:29,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 396 transitions. [2021-06-05 23:01:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:29,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:29,889 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:30,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 23:01:30,092 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 66 times [2021-06-05 23:01:30,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:30,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102210592] [2021-06-05 23:01:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:30,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:30,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102210592] [2021-06-05 23:01:30,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102210592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:30,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140243926] [2021-06-05 23:01:30,338 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:30,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:01:30,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:30,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:01:30,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140243926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:30,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:30,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:01:30,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290335772] [2021-06-05 23:01:30,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:01:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:01:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:01:30,677 INFO L87 Difference]: Start difference. First operand 194 states and 396 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:32,067 INFO L93 Difference]: Finished difference Result 469 states and 906 transitions. [2021-06-05 23:01:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:01:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:32,068 INFO L225 Difference]: With dead ends: 469 [2021-06-05 23:01:32,068 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 23:01:32,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1427.2ms TimeCoverageRelationStatistics Valid=731, Invalid=4969, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:01:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 23:01:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 248. [2021-06-05 23:01:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.1214574898785425) internal successors, (524), 247 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 524 transitions. [2021-06-05 23:01:32,072 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 524 transitions. Word has length 31 [2021-06-05 23:01:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:32,072 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 524 transitions. [2021-06-05 23:01:32,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 524 transitions. [2021-06-05 23:01:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:32,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:32,073 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:32,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 23:01:32,273 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1037382439, now seen corresponding path program 67 times [2021-06-05 23:01:32,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:32,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193306143] [2021-06-05 23:01:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:32,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:32,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193306143] [2021-06-05 23:01:32,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193306143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:32,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827890726] [2021-06-05 23:01:32,519 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:32,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:32,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827890726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:32,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:32,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:32,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901624150] [2021-06-05 23:01:32,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:32,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:32,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:32,893 INFO L87 Difference]: Start difference. First operand 248 states and 524 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:34,363 INFO L93 Difference]: Finished difference Result 489 states and 939 transitions. [2021-06-05 23:01:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:01:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:34,364 INFO L225 Difference]: With dead ends: 489 [2021-06-05 23:01:34,364 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 23:01:34,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1570.7ms TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:01:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 23:01:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 250. [2021-06-05 23:01:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.1204819277108435) internal successors, (528), 249 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 528 transitions. [2021-06-05 23:01:34,368 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 528 transitions. Word has length 31 [2021-06-05 23:01:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:34,368 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 528 transitions. [2021-06-05 23:01:34,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 528 transitions. [2021-06-05 23:01:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:34,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:34,368 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:34,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:34,569 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2133425259, now seen corresponding path program 68 times [2021-06-05 23:01:34,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:34,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281210550] [2021-06-05 23:01:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:34,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:34,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281210550] [2021-06-05 23:01:34,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281210550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:34,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26801064] [2021-06-05 23:01:34,782 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:34,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:34,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:34,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26801064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:35,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:35,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:35,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995649682] [2021-06-05 23:01:35,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:35,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:35,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:35,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:35,089 INFO L87 Difference]: Start difference. First operand 250 states and 528 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:36,765 INFO L93 Difference]: Finished difference Result 487 states and 937 transitions. [2021-06-05 23:01:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:01:36,765 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:36,766 INFO L225 Difference]: With dead ends: 487 [2021-06-05 23:01:36,766 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 23:01:36,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1576.8ms TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:01:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 23:01:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 252. [2021-06-05 23:01:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.1195219123505975) internal successors, (532), 251 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 532 transitions. [2021-06-05 23:01:36,771 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 532 transitions. Word has length 31 [2021-06-05 23:01:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:36,771 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 532 transitions. [2021-06-05 23:01:36,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 532 transitions. [2021-06-05 23:01:36,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:36,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:36,772 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:36,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:36,985 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1329117521, now seen corresponding path program 69 times [2021-06-05 23:01:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484479841] [2021-06-05 23:01:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:37,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:37,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484479841] [2021-06-05 23:01:37,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484479841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:37,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609618112] [2021-06-05 23:01:37,236 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:37,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:01:37,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:37,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:37,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609618112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:37,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:37,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:37,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272190306] [2021-06-05 23:01:37,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:37,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:37,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:37,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:37,570 INFO L87 Difference]: Start difference. First operand 252 states and 532 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:39,386 INFO L93 Difference]: Finished difference Result 532 states and 1020 transitions. [2021-06-05 23:01:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:01:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:39,387 INFO L225 Difference]: With dead ends: 532 [2021-06-05 23:01:39,387 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 23:01:39,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 1817.1ms TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:01:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 23:01:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 255. [2021-06-05 23:01:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-06-05 23:01:39,391 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-06-05 23:01:39,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:39,391 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-06-05 23:01:39,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:39,391 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-06-05 23:01:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:39,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:39,392 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:39,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:39,592 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1700921915, now seen corresponding path program 70 times [2021-06-05 23:01:39,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:39,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214000933] [2021-06-05 23:01:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:39,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:39,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214000933] [2021-06-05 23:01:39,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214000933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:39,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852204463] [2021-06-05 23:01:39,887 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:39,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:39,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:39,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:39,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:40,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852204463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:40,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:40,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:40,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072554994] [2021-06-05 23:01:40,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:40,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:40,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:40,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:40,244 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:41,874 INFO L93 Difference]: Finished difference Result 465 states and 897 transitions. [2021-06-05 23:01:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:01:41,874 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:41,875 INFO L225 Difference]: With dead ends: 465 [2021-06-05 23:01:41,875 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 23:01:41,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 1723.6ms TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 23:01:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 23:01:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 255. [2021-06-05 23:01:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-06-05 23:01:41,878 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-06-05 23:01:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:41,878 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-06-05 23:01:41,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-06-05 23:01:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:41,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:41,879 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:42,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 23:01:42,081 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1287765489, now seen corresponding path program 71 times [2021-06-05 23:01:42,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:42,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114263613] [2021-06-05 23:01:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:42,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:42,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114263613] [2021-06-05 23:01:42,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114263613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:42,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240483898] [2021-06-05 23:01:42,297 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:42,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:01:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:42,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:42,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240483898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:42,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:42,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:42,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582980221] [2021-06-05 23:01:42,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:42,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:42,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:42,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:42,606 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:44,115 INFO L93 Difference]: Finished difference Result 465 states and 901 transitions. [2021-06-05 23:01:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:01:44,115 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:44,116 INFO L225 Difference]: With dead ends: 465 [2021-06-05 23:01:44,116 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 23:01:44,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1467.7ms TimeCoverageRelationStatistics Valid=752, Invalid=5568, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:01:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 23:01:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 265. [2021-06-05 23:01:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.121212121212121) internal successors, (560), 264 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 560 transitions. [2021-06-05 23:01:44,119 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 560 transitions. Word has length 31 [2021-06-05 23:01:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:44,120 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 560 transitions. [2021-06-05 23:01:44,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 560 transitions. [2021-06-05 23:01:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:44,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:44,120 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:44,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:44,322 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2120190005, now seen corresponding path program 72 times [2021-06-05 23:01:44,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:44,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996993502] [2021-06-05 23:01:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:44,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:44,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996993502] [2021-06-05 23:01:44,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996993502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:44,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785802816] [2021-06-05 23:01:44,599 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:44,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:01:44,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:44,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:44,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:44,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785802816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:44,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:44,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:44,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396647675] [2021-06-05 23:01:44,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:44,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:44,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:44,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:44,920 INFO L87 Difference]: Start difference. First operand 265 states and 560 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:46,656 INFO L93 Difference]: Finished difference Result 518 states and 999 transitions. [2021-06-05 23:01:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:01:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:46,657 INFO L225 Difference]: With dead ends: 518 [2021-06-05 23:01:46,657 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 23:01:46,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 1706.2ms TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:01:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 23:01:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 267. [2021-06-05 23:01:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1240601503759398) internal successors, (565), 266 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 565 transitions. [2021-06-05 23:01:46,661 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 565 transitions. Word has length 31 [2021-06-05 23:01:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:46,662 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 565 transitions. [2021-06-05 23:01:46,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 565 transitions. [2021-06-05 23:01:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:46,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:46,662 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:46,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:46,877 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash 855262145, now seen corresponding path program 73 times [2021-06-05 23:01:46,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:46,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250958048] [2021-06-05 23:01:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:47,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:47,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250958048] [2021-06-05 23:01:47,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250958048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:47,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394352898] [2021-06-05 23:01:47,132 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:47,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:47,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394352898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:47,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:47,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:47,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698325547] [2021-06-05 23:01:47,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:47,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:47,445 INFO L87 Difference]: Start difference. First operand 267 states and 565 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:49,221 INFO L93 Difference]: Finished difference Result 448 states and 878 transitions. [2021-06-05 23:01:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:01:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:49,222 INFO L225 Difference]: With dead ends: 448 [2021-06-05 23:01:49,222 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 23:01:49,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1685.6ms TimeCoverageRelationStatistics Valid=808, Invalid=5044, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:01:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 23:01:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 263. [2021-06-05 23:01:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.1068702290076335) internal successors, (552), 262 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 552 transitions. [2021-06-05 23:01:49,226 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 552 transitions. Word has length 31 [2021-06-05 23:01:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:49,226 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 552 transitions. [2021-06-05 23:01:49,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 552 transitions. [2021-06-05 23:01:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:49,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:49,226 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:49,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:49,427 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:49,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:49,427 INFO L82 PathProgramCache]: Analyzing trace with hash 389420273, now seen corresponding path program 74 times [2021-06-05 23:01:49,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:49,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695980926] [2021-06-05 23:01:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:49,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:49,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695980926] [2021-06-05 23:01:49,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695980926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:49,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512457193] [2021-06-05 23:01:49,599 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:49,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:49,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:49,623 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:49,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512457193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:49,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:49,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148934731] [2021-06-05 23:01:49,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:49,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:49,943 INFO L87 Difference]: Start difference. First operand 263 states and 552 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:51,856 INFO L93 Difference]: Finished difference Result 529 states and 1039 transitions. [2021-06-05 23:01:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:01:51,857 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:51,857 INFO L225 Difference]: With dead ends: 529 [2021-06-05 23:01:51,857 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 23:01:51,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 1878.4ms TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:01:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 23:01:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 276. [2021-06-05 23:01:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1163636363636362) internal successors, (582), 275 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 582 transitions. [2021-06-05 23:01:51,861 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 582 transitions. Word has length 31 [2021-06-05 23:01:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:51,861 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 582 transitions. [2021-06-05 23:01:51,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 582 transitions. [2021-06-05 23:01:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:51,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:51,862 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:52,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 23:01:52,062 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash -875507587, now seen corresponding path program 75 times [2021-06-05 23:01:52,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:52,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443024007] [2021-06-05 23:01:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:52,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:52,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443024007] [2021-06-05 23:01:52,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443024007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:52,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387722698] [2021-06-05 23:01:52,250 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:52,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:01:52,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:52,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:01:52,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:52,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387722698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:52,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:52,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:01:52,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418580318] [2021-06-05 23:01:52,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:01:52,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:52,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:01:52,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:01:52,566 INFO L87 Difference]: Start difference. First operand 276 states and 582 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:54,437 INFO L93 Difference]: Finished difference Result 518 states and 1018 transitions. [2021-06-05 23:01:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:01:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:54,438 INFO L225 Difference]: With dead ends: 518 [2021-06-05 23:01:54,438 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 23:01:54,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1716.9ms TimeCoverageRelationStatistics Valid=909, Invalid=6063, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:01:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 23:01:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 273. [2021-06-05 23:01:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.099264705882353) internal successors, (571), 272 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 571 transitions. [2021-06-05 23:01:54,443 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 571 transitions. Word has length 31 [2021-06-05 23:01:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:54,443 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 571 transitions. [2021-06-05 23:01:54,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 571 transitions. [2021-06-05 23:01:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:01:54,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:54,444 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:54,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:54,666 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1413332923, now seen corresponding path program 76 times [2021-06-05 23:01:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:54,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987102129] [2021-06-05 23:01:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:54,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:54,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987102129] [2021-06-05 23:01:54,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987102129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:54,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396779078] [2021-06-05 23:01:54,883 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:54,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:54,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:54,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:01:54,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:55,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396779078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:55,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:55,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-06-05 23:01:55,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396984102] [2021-06-05 23:01:55,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:01:55,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:55,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:01:55,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:01:55,360 INFO L87 Difference]: Start difference. First operand 273 states and 571 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:57,421 INFO L93 Difference]: Finished difference Result 473 states and 960 transitions. [2021-06-05 23:01:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:01:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:01:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:57,422 INFO L225 Difference]: With dead ends: 473 [2021-06-05 23:01:57,422 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 23:01:57,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 2050.9ms TimeCoverageRelationStatistics Valid=655, Invalid=4315, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:01:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 23:01:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 303. [2021-06-05 23:01:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.096026490066225) internal successors, (633), 302 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 633 transitions. [2021-06-05 23:01:57,427 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 633 transitions. Word has length 31 [2021-06-05 23:01:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:57,427 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 633 transitions. [2021-06-05 23:01:57,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 633 transitions. [2021-06-05 23:01:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:01:57,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:57,428 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:57,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 23:01:57,641 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:57,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1311105745, now seen corresponding path program 77 times [2021-06-05 23:01:57,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:57,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334938843] [2021-06-05 23:01:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:01:57,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:57,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334938843] [2021-06-05 23:01:57,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334938843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:57,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616487727] [2021-06-05 23:01:57,689 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:57,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:01:57,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:57,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:01:57,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616487727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:57,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:57,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 23:01:57,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613616528] [2021-06-05 23:01:57,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:01:57,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:57,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:01:57,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:01:57,777 INFO L87 Difference]: Start difference. First operand 303 states and 633 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:57,873 INFO L93 Difference]: Finished difference Result 483 states and 979 transitions. [2021-06-05 23:01:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:01:57,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 23:01:57,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:57,874 INFO L225 Difference]: With dead ends: 483 [2021-06-05 23:01:57,874 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 23:01:57,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:01:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 23:01:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 310. [2021-06-05 23:01:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.0938511326860842) internal successors, (647), 309 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 647 transitions. [2021-06-05 23:01:57,878 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 647 transitions. Word has length 33 [2021-06-05 23:01:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:57,879 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 647 transitions. [2021-06-05 23:01:57,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 647 transitions. [2021-06-05 23:01:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:01:57,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:57,879 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:58,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 23:01:58,097 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1845552953, now seen corresponding path program 78 times [2021-06-05 23:01:58,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:58,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247581802] [2021-06-05 23:01:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:58,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:58,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247581802] [2021-06-05 23:01:58,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247581802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:58,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161340722] [2021-06-05 23:01:58,388 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:58,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:01:58,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:58,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:01:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:58,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161340722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:58,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:58,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 23:01:58,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643106144] [2021-06-05 23:01:58,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:01:58,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:58,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:01:58,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:01:58,866 INFO L87 Difference]: Start difference. First operand 310 states and 647 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:03,298 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 23:02:03,533 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 23:02:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:05,338 INFO L93 Difference]: Finished difference Result 1038 states and 2060 transitions. [2021-06-05 23:02:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 23:02:05,338 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 23:02:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:05,339 INFO L225 Difference]: With dead ends: 1038 [2021-06-05 23:02:05,340 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 23:02:05,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 6074.9ms TimeCoverageRelationStatistics Valid=2584, Invalid=18008, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 23:02:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 23:02:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 386. [2021-06-05 23:02:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.109090909090909) internal successors, (812), 385 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 812 transitions. [2021-06-05 23:02:05,345 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 812 transitions. Word has length 33 [2021-06-05 23:02:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:05,345 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 812 transitions. [2021-06-05 23:02:05,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 812 transitions. [2021-06-05 23:02:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:02:05,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:05,346 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:05,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 23:02:05,546 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash -360118039, now seen corresponding path program 79 times [2021-06-05 23:02:05,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:05,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213205101] [2021-06-05 23:02:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:05,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:05,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213205101] [2021-06-05 23:02:05,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213205101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:05,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84144771] [2021-06-05 23:02:05,744 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:05,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:02:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:06,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84144771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:06,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:06,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:02:06,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933466513] [2021-06-05 23:02:06,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:02:06,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:06,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:02:06,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:02:06,157 INFO L87 Difference]: Start difference. First operand 386 states and 812 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:07,523 INFO L93 Difference]: Finished difference Result 583 states and 1174 transitions. [2021-06-05 23:02:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:02:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 23:02:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:07,524 INFO L225 Difference]: With dead ends: 583 [2021-06-05 23:02:07,525 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 23:02:07,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1240.6ms TimeCoverageRelationStatistics Valid=418, Invalid=4004, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:02:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 23:02:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 349. [2021-06-05 23:02:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.103448275862069) internal successors, (732), 348 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 732 transitions. [2021-06-05 23:02:07,528 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 732 transitions. Word has length 33 [2021-06-05 23:02:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:07,528 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 732 transitions. [2021-06-05 23:02:07,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 732 transitions. [2021-06-05 23:02:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:07,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:07,529 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:07,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:07,729 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 80 times [2021-06-05 23:02:07,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:07,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009061197] [2021-06-05 23:02:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:07,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009061197] [2021-06-05 23:02:07,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009061197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878248410] [2021-06-05 23:02:07,966 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:07,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:07,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:07,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:07,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:08,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878248410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:08,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:08,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:08,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853096625] [2021-06-05 23:02:08,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:08,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:08,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:08,332 INFO L87 Difference]: Start difference. First operand 349 states and 732 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:09,891 INFO L93 Difference]: Finished difference Result 782 states and 1584 transitions. [2021-06-05 23:02:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 23:02:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:09,893 INFO L225 Difference]: With dead ends: 782 [2021-06-05 23:02:09,893 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 23:02:09,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1674.7ms TimeCoverageRelationStatistics Valid=913, Invalid=6227, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:02:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 23:02:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 461. [2021-06-05 23:02:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.1869565217391305) internal successors, (1006), 460 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1006 transitions. [2021-06-05 23:02:09,902 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1006 transitions. Word has length 35 [2021-06-05 23:02:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:09,902 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1006 transitions. [2021-06-05 23:02:09,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1006 transitions. [2021-06-05 23:02:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:09,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:09,903 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:10,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:10,117 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:10,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1678953501, now seen corresponding path program 81 times [2021-06-05 23:02:10,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:10,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275394302] [2021-06-05 23:02:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:10,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:10,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275394302] [2021-06-05 23:02:10,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275394302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:10,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738565003] [2021-06-05 23:02:10,357 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:10,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:02:10,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:10,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:10,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:10,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738565003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:10,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:10,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:10,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356677967] [2021-06-05 23:02:10,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:10,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:10,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:10,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:10,734 INFO L87 Difference]: Start difference. First operand 461 states and 1006 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:12,510 INFO L93 Difference]: Finished difference Result 808 states and 1627 transitions. [2021-06-05 23:02:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:02:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:12,512 INFO L225 Difference]: With dead ends: 808 [2021-06-05 23:02:12,512 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 23:02:12,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 1763.2ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:02:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 23:02:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 463. [2021-06-05 23:02:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.186147186147186) internal successors, (1010), 462 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1010 transitions. [2021-06-05 23:02:12,520 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1010 transitions. Word has length 35 [2021-06-05 23:02:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:12,520 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1010 transitions. [2021-06-05 23:02:12,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1010 transitions. [2021-06-05 23:02:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:12,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:12,521 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:12,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:12,737 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash -648791001, now seen corresponding path program 82 times [2021-06-05 23:02:12,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:12,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759144941] [2021-06-05 23:02:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:12,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:12,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759144941] [2021-06-05 23:02:12,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759144941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:12,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598594705] [2021-06-05 23:02:12,972 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:12,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:12,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:13,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598594705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:13,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:13,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:13,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085805183] [2021-06-05 23:02:13,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:13,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:13,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:13,345 INFO L87 Difference]: Start difference. First operand 463 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:15,190 INFO L93 Difference]: Finished difference Result 806 states and 1625 transitions. [2021-06-05 23:02:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 23:02:15,191 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:15,192 INFO L225 Difference]: With dead ends: 806 [2021-06-05 23:02:15,192 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 23:02:15,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 1852.7ms TimeCoverageRelationStatistics Valid=1094, Invalid=7836, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:02:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 23:02:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 465. [2021-06-05 23:02:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.185344827586207) internal successors, (1014), 464 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1014 transitions. [2021-06-05 23:02:15,198 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1014 transitions. Word has length 35 [2021-06-05 23:02:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:15,198 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1014 transitions. [2021-06-05 23:02:15,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1014 transitions. [2021-06-05 23:02:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:15,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:15,199 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:15,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:15,399 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash 447251819, now seen corresponding path program 83 times [2021-06-05 23:02:15,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:15,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113046933] [2021-06-05 23:02:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:15,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113046933] [2021-06-05 23:02:15,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113046933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679743250] [2021-06-05 23:02:15,671 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:15,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:02:15,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:15,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:15,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:16,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679743250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:16,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:16,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:16,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095387041] [2021-06-05 23:02:16,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:16,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:16,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:16,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:16,086 INFO L87 Difference]: Start difference. First operand 465 states and 1014 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:18,222 INFO L93 Difference]: Finished difference Result 806 states and 1627 transitions. [2021-06-05 23:02:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 23:02:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:18,223 INFO L225 Difference]: With dead ends: 806 [2021-06-05 23:02:18,223 INFO L226 Difference]: Without dead ends: 768 [2021-06-05 23:02:18,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 2041.3ms TimeCoverageRelationStatistics Valid=1216, Invalid=8684, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 23:02:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-05 23:02:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-06-05 23:02:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.184549356223176) internal successors, (1018), 466 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1018 transitions. [2021-06-05 23:02:18,229 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1018 transitions. Word has length 35 [2021-06-05 23:02:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:18,229 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1018 transitions. [2021-06-05 23:02:18,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1018 transitions. [2021-06-05 23:02:18,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:18,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:18,230 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:18,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 23:02:18,431 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:18,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1279676335, now seen corresponding path program 84 times [2021-06-05 23:02:18,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:18,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123559384] [2021-06-05 23:02:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:18,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:18,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123559384] [2021-06-05 23:02:18,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123559384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:18,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645947333] [2021-06-05 23:02:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:18,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:02:18,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:18,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:02:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:19,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645947333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:19,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:19,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:19,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006749584] [2021-06-05 23:02:19,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:19,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:19,199 INFO L87 Difference]: Start difference. First operand 467 states and 1018 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:22,346 INFO L93 Difference]: Finished difference Result 865 states and 1736 transitions. [2021-06-05 23:02:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 23:02:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:22,347 INFO L225 Difference]: With dead ends: 865 [2021-06-05 23:02:22,347 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 23:02:22,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2835.6ms TimeCoverageRelationStatistics Valid=1448, Invalid=10984, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 23:02:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 23:02:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 470. [2021-06-05 23:02:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-06-05 23:02:22,353 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-06-05 23:02:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:22,353 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-06-05 23:02:22,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-06-05 23:02:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:22,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:22,354 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:22,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 23:02:22,555 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:22,555 INFO L82 PathProgramCache]: Analyzing trace with hash 14748475, now seen corresponding path program 85 times [2021-06-05 23:02:22,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:22,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490170311] [2021-06-05 23:02:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:22,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490170311] [2021-06-05 23:02:22,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490170311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337904336] [2021-06-05 23:02:22,818 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:22,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:23,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337904336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:23,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:23,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:23,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380371867] [2021-06-05 23:02:23,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:23,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:23,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:23,195 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:25,352 INFO L93 Difference]: Finished difference Result 746 states and 1501 transitions. [2021-06-05 23:02:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:02:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:25,353 INFO L225 Difference]: With dead ends: 746 [2021-06-05 23:02:25,353 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 23:02:25,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 2039.5ms TimeCoverageRelationStatistics Valid=1253, Invalid=7867, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 23:02:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 23:02:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 470. [2021-06-05 23:02:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-06-05 23:02:25,358 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-06-05 23:02:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:25,358 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-06-05 23:02:25,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-06-05 23:02:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:25,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:25,359 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:25,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 23:02:25,559 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:25,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1579011027, now seen corresponding path program 86 times [2021-06-05 23:02:25,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:25,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946001877] [2021-06-05 23:02:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:25,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:25,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946001877] [2021-06-05 23:02:25,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946001877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:25,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746156504] [2021-06-05 23:02:25,800 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:25,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:25,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:26,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746156504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:26,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:26,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:26,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873071855] [2021-06-05 23:02:26,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:26,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:26,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:26,165 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:28,023 INFO L93 Difference]: Finished difference Result 776 states and 1568 transitions. [2021-06-05 23:02:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:02:28,023 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:28,024 INFO L225 Difference]: With dead ends: 776 [2021-06-05 23:02:28,024 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 23:02:28,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 1727.7ms TimeCoverageRelationStatistics Valid=930, Invalid=7080, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:02:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 23:02:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 476. [2021-06-05 23:02:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.185263157894737) internal successors, (1038), 475 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1038 transitions. [2021-06-05 23:02:28,029 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1038 transitions. Word has length 35 [2021-06-05 23:02:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:28,030 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1038 transitions. [2021-06-05 23:02:28,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1038 transitions. [2021-06-05 23:02:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:28,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:28,031 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:28,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 23:02:28,245 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash -482968207, now seen corresponding path program 87 times [2021-06-05 23:02:28,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:28,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762925630] [2021-06-05 23:02:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:28,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:28,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762925630] [2021-06-05 23:02:28,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762925630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:28,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718257509] [2021-06-05 23:02:28,500 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:28,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:02:28,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:28,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:02:28,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:29,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718257509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:29,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:29,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:29,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54641796] [2021-06-05 23:02:29,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:29,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:29,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:29,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:29,102 INFO L87 Difference]: Start difference. First operand 476 states and 1038 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:31,550 INFO L93 Difference]: Finished difference Result 777 states and 1580 transitions. [2021-06-05 23:02:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 23:02:31,550 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:31,551 INFO L225 Difference]: With dead ends: 777 [2021-06-05 23:02:31,551 INFO L226 Difference]: Without dead ends: 739 [2021-06-05 23:02:31,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2404.4ms TimeCoverageRelationStatistics Valid=1089, Invalid=8613, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:02:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-05 23:02:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 482. [2021-06-05 23:02:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.191268191268191) internal successors, (1054), 481 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1054 transitions. [2021-06-05 23:02:31,556 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1054 transitions. Word has length 35 [2021-06-05 23:02:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:31,556 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1054 transitions. [2021-06-05 23:02:31,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1054 transitions. [2021-06-05 23:02:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:31,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:31,557 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:31,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 23:02:31,758 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:31,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:31,758 INFO L82 PathProgramCache]: Analyzing trace with hash 349456309, now seen corresponding path program 88 times [2021-06-05 23:02:31,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:31,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683295294] [2021-06-05 23:02:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:32,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:32,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683295294] [2021-06-05 23:02:32,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683295294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:32,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575853046] [2021-06-05 23:02:32,026 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:32,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:32,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:32,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:32,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575853046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:32,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:32,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:32,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069087134] [2021-06-05 23:02:32,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:32,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:32,411 INFO L87 Difference]: Start difference. First operand 482 states and 1054 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:34,530 INFO L93 Difference]: Finished difference Result 849 states and 1716 transitions. [2021-06-05 23:02:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:02:34,531 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:34,531 INFO L225 Difference]: With dead ends: 849 [2021-06-05 23:02:34,531 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 23:02:34,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 2103.7ms TimeCoverageRelationStatistics Valid=1198, Invalid=8504, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:02:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 23:02:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 486. [2021-06-05 23:02:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.195876288659794) internal successors, (1065), 485 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1065 transitions. [2021-06-05 23:02:34,539 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1065 transitions. Word has length 35 [2021-06-05 23:02:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:34,539 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1065 transitions. [2021-06-05 23:02:34,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1065 transitions. [2021-06-05 23:02:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:34,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:34,540 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:34,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:34,753 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash -915471551, now seen corresponding path program 89 times [2021-06-05 23:02:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:34,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716353811] [2021-06-05 23:02:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:34,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:34,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716353811] [2021-06-05 23:02:34,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716353811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:34,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935796655] [2021-06-05 23:02:34,998 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:35,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:02:35,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:35,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:35,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:35,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935796655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:35,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:35,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:35,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317547025] [2021-06-05 23:02:35,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:35,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:35,368 INFO L87 Difference]: Start difference. First operand 486 states and 1065 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:37,380 INFO L93 Difference]: Finished difference Result 747 states and 1522 transitions. [2021-06-05 23:02:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:02:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:37,381 INFO L225 Difference]: With dead ends: 747 [2021-06-05 23:02:37,381 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 23:02:37,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 1934.2ms TimeCoverageRelationStatistics Valid=1132, Invalid=7240, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 23:02:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 23:02:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 388. [2021-06-05 23:02:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.13953488372093) internal successors, (828), 387 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 828 transitions. [2021-06-05 23:02:37,386 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 828 transitions. Word has length 35 [2021-06-05 23:02:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:37,386 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 828 transitions. [2021-06-05 23:02:37,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 828 transitions. [2021-06-05 23:02:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:37,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:37,387 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:37,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:37,588 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:37,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1600337107, now seen corresponding path program 90 times [2021-06-05 23:02:37,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:37,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700718024] [2021-06-05 23:02:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:37,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:37,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700718024] [2021-06-05 23:02:37,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700718024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:37,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244957084] [2021-06-05 23:02:37,822 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:37,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:02:37,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:37,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:02:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:38,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244957084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:38,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:38,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:38,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335674863] [2021-06-05 23:02:38,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:38,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:38,308 INFO L87 Difference]: Start difference. First operand 388 states and 828 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:40,619 INFO L93 Difference]: Finished difference Result 635 states and 1250 transitions. [2021-06-05 23:02:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:02:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:40,620 INFO L225 Difference]: With dead ends: 635 [2021-06-05 23:02:40,620 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 23:02:40,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 2259.5ms TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:02:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 23:02:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 392. [2021-06-05 23:02:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.1381074168797953) internal successors, (836), 391 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 836 transitions. [2021-06-05 23:02:40,624 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 836 transitions. Word has length 35 [2021-06-05 23:02:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:40,624 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 836 transitions. [2021-06-05 23:02:40,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 836 transitions. [2021-06-05 23:02:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:40,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:40,625 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:40,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:40,825 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:40,826 INFO L82 PathProgramCache]: Analyzing trace with hash -767912591, now seen corresponding path program 91 times [2021-06-05 23:02:40,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:40,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259773011] [2021-06-05 23:02:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:41,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:41,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259773011] [2021-06-05 23:02:41,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259773011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:41,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036268436] [2021-06-05 23:02:41,077 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:41,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:41,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036268436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:41,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:41,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:41,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683003116] [2021-06-05 23:02:41,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:41,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:41,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:41,456 INFO L87 Difference]: Start difference. First operand 392 states and 836 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:43,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:43,648 INFO L93 Difference]: Finished difference Result 700 states and 1368 transitions. [2021-06-05 23:02:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:02:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:43,649 INFO L225 Difference]: With dead ends: 700 [2021-06-05 23:02:43,649 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 23:02:43,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 2078.3ms TimeCoverageRelationStatistics Valid=1195, Invalid=8705, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 23:02:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 23:02:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 394. [2021-06-05 23:02:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.1399491094147582) internal successors, (841), 393 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 841 transitions. [2021-06-05 23:02:43,653 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 841 transitions. Word has length 35 [2021-06-05 23:02:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:43,653 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 841 transitions. [2021-06-05 23:02:43,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 841 transitions. [2021-06-05 23:02:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:43,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:43,654 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:43,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 23:02:43,855 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:43,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2032840451, now seen corresponding path program 92 times [2021-06-05 23:02:43,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:43,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622911714] [2021-06-05 23:02:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:44,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622911714] [2021-06-05 23:02:44,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622911714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414447681] [2021-06-05 23:02:44,132 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:44,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:44,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:44,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:44,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:44,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414447681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:44,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:44,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:44,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223482043] [2021-06-05 23:02:44,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:44,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:44,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:44,521 INFO L87 Difference]: Start difference. First operand 394 states and 841 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:46,429 INFO L93 Difference]: Finished difference Result 618 states and 1227 transitions. [2021-06-05 23:02:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:02:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:46,430 INFO L225 Difference]: With dead ends: 618 [2021-06-05 23:02:46,430 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 23:02:46,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 1953.2ms TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 23:02:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 23:02:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 382. [2021-06-05 23:02:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.120734908136483) internal successors, (808), 381 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 808 transitions. [2021-06-05 23:02:46,434 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 808 transitions. Word has length 35 [2021-06-05 23:02:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:46,434 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 808 transitions. [2021-06-05 23:02:46,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 808 transitions. [2021-06-05 23:02:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:46,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:46,435 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:46,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 23:02:46,635 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:46,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1796284973, now seen corresponding path program 93 times [2021-06-05 23:02:46,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:46,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179002385] [2021-06-05 23:02:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:46,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:46,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179002385] [2021-06-05 23:02:46,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179002385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:46,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822193849] [2021-06-05 23:02:46,882 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:46,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:02:46,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:46,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:02:46,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:47,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822193849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:47,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:47,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:47,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754846404] [2021-06-05 23:02:47,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:47,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:47,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:47,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:47,269 INFO L87 Difference]: Start difference. First operand 382 states and 808 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:50,036 INFO L93 Difference]: Finished difference Result 714 states and 1421 transitions. [2021-06-05 23:02:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 23:02:50,036 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:50,037 INFO L225 Difference]: With dead ends: 714 [2021-06-05 23:02:50,037 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 23:02:50,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 2620.9ms TimeCoverageRelationStatistics Valid=1422, Invalid=10568, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 23:02:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 23:02:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 398. [2021-06-05 23:02:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.123425692695214) internal successors, (843), 397 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 843 transitions. [2021-06-05 23:02:50,041 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 843 transitions. Word has length 35 [2021-06-05 23:02:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:50,041 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 843 transitions. [2021-06-05 23:02:50,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 843 transitions. [2021-06-05 23:02:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:50,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:50,042 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:50,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 23:02:50,242 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:50,243 INFO L82 PathProgramCache]: Analyzing trace with hash 531357113, now seen corresponding path program 94 times [2021-06-05 23:02:50,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:50,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617250707] [2021-06-05 23:02:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:50,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:50,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617250707] [2021-06-05 23:02:50,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617250707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:50,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581009766] [2021-06-05 23:02:50,494 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:50,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:50,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:50,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581009766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:50,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:50,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:02:50,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939937914] [2021-06-05 23:02:50,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:50,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:50,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:50,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:50,888 INFO L87 Difference]: Start difference. First operand 398 states and 843 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:53,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:53,298 INFO L93 Difference]: Finished difference Result 728 states and 1445 transitions. [2021-06-05 23:02:53,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:02:53,298 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:53,299 INFO L225 Difference]: With dead ends: 728 [2021-06-05 23:02:53,299 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 23:02:53,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 2280.7ms TimeCoverageRelationStatistics Valid=1275, Invalid=8427, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:02:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 23:02:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 365. [2021-06-05 23:02:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.0851648351648353) internal successors, (759), 364 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 759 transitions. [2021-06-05 23:02:53,304 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 759 transitions. Word has length 35 [2021-06-05 23:02:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:53,304 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 759 transitions. [2021-06-05 23:02:53,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 759 transitions. [2021-06-05 23:02:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:53,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:53,305 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:53,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:53,509 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash 850528961, now seen corresponding path program 95 times [2021-06-05 23:02:53,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:53,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048451608] [2021-06-05 23:02:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:53,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048451608] [2021-06-05 23:02:53,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048451608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290623716] [2021-06-05 23:02:53,741 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:53,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:02:53,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:53,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:02:53,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290623716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:54,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:54,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 23:02:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207279121] [2021-06-05 23:02:54,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:02:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:02:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:02:54,306 INFO L87 Difference]: Start difference. First operand 365 states and 759 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:57,852 INFO L93 Difference]: Finished difference Result 641 states and 1294 transitions. [2021-06-05 23:02:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 23:02:57,852 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:57,853 INFO L225 Difference]: With dead ends: 641 [2021-06-05 23:02:57,853 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 23:02:57,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3222.5ms TimeCoverageRelationStatistics Valid=1181, Invalid=8325, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:02:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 23:02:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 381. [2021-06-05 23:02:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.081578947368421) internal successors, (791), 380 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 791 transitions. [2021-06-05 23:02:57,858 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 791 transitions. Word has length 35 [2021-06-05 23:02:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:57,858 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 791 transitions. [2021-06-05 23:02:57,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 791 transitions. [2021-06-05 23:02:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:02:57,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:57,859 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:58,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:58,073 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 72244865, now seen corresponding path program 96 times [2021-06-05 23:02:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:58,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173890094] [2021-06-05 23:02:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:58,402 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-05 23:02:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:58,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:58,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173890094] [2021-06-05 23:02:58,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173890094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:58,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170080057] [2021-06-05 23:02:58,530 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:58,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:02:58,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:58,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:02:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:58,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170080057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:58,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:58,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 23:02:58,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197245536] [2021-06-05 23:02:58,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:02:58,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:58,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:02:58,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:02:58,968 INFO L87 Difference]: Start difference. First operand 381 states and 791 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:59,827 INFO L93 Difference]: Finished difference Result 540 states and 1106 transitions. [2021-06-05 23:02:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:02:59,828 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 23:02:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:59,828 INFO L225 Difference]: With dead ends: 540 [2021-06-05 23:02:59,828 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 23:02:59,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 923.2ms TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:02:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 23:02:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 385. [2021-06-05 23:02:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0807291666666665) internal successors, (799), 384 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 799 transitions. [2021-06-05 23:02:59,832 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 799 transitions. Word has length 35 [2021-06-05 23:02:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:59,832 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 799 transitions. [2021-06-05 23:02:59,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 799 transitions. [2021-06-05 23:02:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:59,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:59,833 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:00,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 23:03:00,033 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash 428848235, now seen corresponding path program 97 times [2021-06-05 23:03:00,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:00,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838692039] [2021-06-05 23:03:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:03:00,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:00,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838692039] [2021-06-05 23:03:00,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838692039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:00,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946293564] [2021-06-05 23:03:00,087 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:03:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:03:00,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946293564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:00,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:00,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 23:03:00,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154291710] [2021-06-05 23:03:00,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:03:00,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:03:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:03:00,187 INFO L87 Difference]: Start difference. First operand 385 states and 799 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:00,294 INFO L93 Difference]: Finished difference Result 609 states and 1226 transitions. [2021-06-05 23:03:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:03:00,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:03:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:00,295 INFO L225 Difference]: With dead ends: 609 [2021-06-05 23:03:00,295 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 23:03:00,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:03:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 23:03:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 422. [2021-06-05 23:03:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0855106888361044) internal successors, (878), 421 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 878 transitions. [2021-06-05 23:03:00,299 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 878 transitions. Word has length 37 [2021-06-05 23:03:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:00,299 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 878 transitions. [2021-06-05 23:03:00,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 878 transitions. [2021-06-05 23:03:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:03:00,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:00,300 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:00,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:00,500 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash 807325429, now seen corresponding path program 98 times [2021-06-05 23:03:00,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:00,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104789644] [2021-06-05 23:03:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:00,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:00,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104789644] [2021-06-05 23:03:00,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104789644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:00,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902272591] [2021-06-05 23:03:00,772 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:00,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:00,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:00,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 23:03:00,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:01,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902272591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:01,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:01,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-06-05 23:03:01,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841722030] [2021-06-05 23:03:01,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:01,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:01,275 INFO L87 Difference]: Start difference. First operand 422 states and 878 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:07,246 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 23:03:08,146 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 23:03:08,412 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 23:03:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:11,301 INFO L93 Difference]: Finished difference Result 1608 states and 3197 transitions. [2021-06-05 23:03:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-06-05 23:03:11,302 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:03:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:11,303 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 23:03:11,303 INFO L226 Difference]: Without dead ends: 1540 [2021-06-05 23:03:11,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15558 ImplicationChecksByTransitivity, 8945.7ms TimeCoverageRelationStatistics Valid=4687, Invalid=33533, Unknown=0, NotChecked=0, Total=38220 [2021-06-05 23:03:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-06-05 23:03:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 585. [2021-06-05 23:03:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1113013698630136) internal successors, (1233), 584 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1233 transitions. [2021-06-05 23:03:11,312 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1233 transitions. Word has length 37 [2021-06-05 23:03:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:11,312 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1233 transitions. [2021-06-05 23:03:11,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:11,313 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1233 transitions. [2021-06-05 23:03:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:03:11,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:11,313 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:11,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:11,537 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1398345563, now seen corresponding path program 99 times [2021-06-05 23:03:11,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:11,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659322497] [2021-06-05 23:03:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:03:11,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:11,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659322497] [2021-06-05 23:03:11,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659322497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:11,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863265982] [2021-06-05 23:03:11,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:11,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:03:11,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:11,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 23:03:11,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:12,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863265982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:12,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:12,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 23:03:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836775652] [2021-06-05 23:03:12,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:12,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:12,356 INFO L87 Difference]: Start difference. First operand 585 states and 1233 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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) [2021-06-05 23:03:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:14,918 INFO L93 Difference]: Finished difference Result 965 states and 1949 transitions. [2021-06-05 23:03:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:03:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:03:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:14,919 INFO L225 Difference]: With dead ends: 965 [2021-06-05 23:03:14,919 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 23:03:14,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 2173.7ms TimeCoverageRelationStatistics Valid=660, Invalid=7350, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:03:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 23:03:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 576. [2021-06-05 23:03:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.1043478260869564) internal successors, (1210), 575 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1210 transitions. [2021-06-05 23:03:14,926 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1210 transitions. Word has length 37 [2021-06-05 23:03:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:14,926 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1210 transitions. [2021-06-05 23:03:14,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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) [2021-06-05 23:03:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1210 transitions. [2021-06-05 23:03:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:03:14,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:14,926 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:15,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 23:03:15,127 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1584538635, now seen corresponding path program 100 times [2021-06-05 23:03:15,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:15,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321504650] [2021-06-05 23:03:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:03:15,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:15,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321504650] [2021-06-05 23:03:15,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321504650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:15,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513174469] [2021-06-05 23:03:15,317 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:15,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:03:15,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:15,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 23:03:15,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:15,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513174469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:15,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:15,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-06-05 23:03:15,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875557382] [2021-06-05 23:03:15,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:03:15,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:03:15,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:03:15,730 INFO L87 Difference]: Start difference. First operand 576 states and 1210 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:16,681 INFO L93 Difference]: Finished difference Result 810 states and 1676 transitions. [2021-06-05 23:03:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:03:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:03:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:16,683 INFO L225 Difference]: With dead ends: 810 [2021-06-05 23:03:16,683 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 23:03:16,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:03:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 23:03:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 536. [2021-06-05 23:03:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 2.1121495327102804) internal successors, (1130), 535 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1130 transitions. [2021-06-05 23:03:16,689 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1130 transitions. Word has length 37 [2021-06-05 23:03:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:16,689 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1130 transitions. [2021-06-05 23:03:16,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1130 transitions. [2021-06-05 23:03:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:03:16,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:16,690 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:16,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 23:03:16,905 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1136264889, now seen corresponding path program 101 times [2021-06-05 23:03:16,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:16,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037154739] [2021-06-05 23:03:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:17,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:17,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037154739] [2021-06-05 23:03:17,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037154739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:17,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394478438] [2021-06-05 23:03:17,153 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:17,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:03:17,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:17,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 23:03:17,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:17,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394478438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:17,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:17,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-06-05 23:03:17,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170090034] [2021-06-05 23:03:17,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:03:17,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:17,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:03:17,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:03:17,650 INFO L87 Difference]: Start difference. First operand 536 states and 1130 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:24,212 INFO L93 Difference]: Finished difference Result 1533 states and 3130 transitions. [2021-06-05 23:03:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-06-05 23:03:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:03:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:24,213 INFO L225 Difference]: With dead ends: 1533 [2021-06-05 23:03:24,213 INFO L226 Difference]: Without dead ends: 1494 [2021-06-05 23:03:24,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8152 ImplicationChecksByTransitivity, 6005.8ms TimeCoverageRelationStatistics Valid=2594, Invalid=18868, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 23:03:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-06-05 23:03:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 599. [2021-06-05 23:03:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.100334448160535) internal successors, (1256), 598 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1256 transitions. [2021-06-05 23:03:24,222 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1256 transitions. Word has length 37 [2021-06-05 23:03:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:24,222 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1256 transitions. [2021-06-05 23:03:24,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1256 transitions. [2021-06-05 23:03:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:24,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:24,223 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:24,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 23:03:24,424 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 102 times [2021-06-05 23:03:24,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:24,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557382228] [2021-06-05 23:03:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:24,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:24,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557382228] [2021-06-05 23:03:24,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557382228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:24,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17788031] [2021-06-05 23:03:24,680 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:24,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:03:24,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:24,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:03:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:25,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17788031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:25,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:25,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:25,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822813263] [2021-06-05 23:03:25,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:25,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:25,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:25,117 INFO L87 Difference]: Start difference. First operand 599 states and 1256 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:27,038 INFO L93 Difference]: Finished difference Result 1197 states and 2449 transitions. [2021-06-05 23:03:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:03:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:27,039 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 23:03:27,039 INFO L226 Difference]: Without dead ends: 1130 [2021-06-05 23:03:27,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 1969.6ms TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:03:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-06-05 23:03:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 752. [2021-06-05 23:03:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.1757656458055927) internal successors, (1634), 751 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1634 transitions. [2021-06-05 23:03:27,048 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1634 transitions. Word has length 39 [2021-06-05 23:03:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:27,048 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 1634 transitions. [2021-06-05 23:03:27,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1634 transitions. [2021-06-05 23:03:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:27,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:27,049 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:27,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:27,250 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1236547937, now seen corresponding path program 103 times [2021-06-05 23:03:27,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:27,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51328779] [2021-06-05 23:03:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:27,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:27,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51328779] [2021-06-05 23:03:27,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51328779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:27,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888016067] [2021-06-05 23:03:27,504 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:27,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:03:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:27,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888016067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:27,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:27,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:27,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094465038] [2021-06-05 23:03:27,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:27,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:27,947 INFO L87 Difference]: Start difference. First operand 752 states and 1634 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:30,121 INFO L93 Difference]: Finished difference Result 1229 states and 2502 transitions. [2021-06-05 23:03:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:03:30,121 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:30,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:30,122 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 23:03:30,122 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 23:03:30,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 2065.4ms TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 23:03:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 23:03:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 754. [2021-06-05 23:03:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.1752988047808763) internal successors, (1638), 753 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1638 transitions. [2021-06-05 23:03:30,133 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1638 transitions. Word has length 39 [2021-06-05 23:03:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:30,133 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 1638 transitions. [2021-06-05 23:03:30,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1638 transitions. [2021-06-05 23:03:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:30,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:30,134 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:30,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 23:03:30,349 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash 907136483, now seen corresponding path program 104 times [2021-06-05 23:03:30,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:30,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030897304] [2021-06-05 23:03:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:30,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:30,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030897304] [2021-06-05 23:03:30,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030897304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318097839] [2021-06-05 23:03:30,663 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:30,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:30,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:30,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:03:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:31,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318097839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:31,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:31,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:31,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360592401] [2021-06-05 23:03:31,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:31,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:31,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:31,098 INFO L87 Difference]: Start difference. First operand 754 states and 1638 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:33,292 INFO L93 Difference]: Finished difference Result 1227 states and 2500 transitions. [2021-06-05 23:03:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 23:03:33,292 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:33,293 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 23:03:33,293 INFO L226 Difference]: Without dead ends: 1177 [2021-06-05 23:03:33,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 2212.6ms TimeCoverageRelationStatistics Valid=1311, Invalid=9609, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 23:03:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-05 23:03:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 756. [2021-06-05 23:03:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.174834437086093) internal successors, (1642), 755 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1642 transitions. [2021-06-05 23:03:33,301 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1642 transitions. Word has length 39 [2021-06-05 23:03:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:33,301 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1642 transitions. [2021-06-05 23:03:33,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1642 transitions. [2021-06-05 23:03:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:33,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:33,301 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:33,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 23:03:33,502 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1937298983, now seen corresponding path program 105 times [2021-06-05 23:03:33,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:33,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72423562] [2021-06-05 23:03:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:33,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:33,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72423562] [2021-06-05 23:03:33,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72423562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:33,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381327360] [2021-06-05 23:03:33,783 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:33,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:03:33,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:33,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:03:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:34,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381327360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:34,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:34,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:34,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898120499] [2021-06-05 23:03:34,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:34,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:34,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:34,438 INFO L87 Difference]: Start difference. First operand 756 states and 1642 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:38,067 INFO L93 Difference]: Finished difference Result 1231 states and 2510 transitions. [2021-06-05 23:03:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:03:38,067 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:38,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:38,068 INFO L225 Difference]: With dead ends: 1231 [2021-06-05 23:03:38,068 INFO L226 Difference]: Without dead ends: 1187 [2021-06-05 23:03:38,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4231 ImplicationChecksByTransitivity, 3318.9ms TimeCoverageRelationStatistics Valid=1548, Invalid=13458, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 23:03:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-05 23:03:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 758. [2021-06-05 23:03:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.1743725231175692) internal successors, (1646), 757 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1646 transitions. [2021-06-05 23:03:38,077 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1646 transitions. Word has length 39 [2021-06-05 23:03:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:38,078 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 1646 transitions. [2021-06-05 23:03:38,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1646 transitions. [2021-06-05 23:03:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:38,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:38,079 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:38,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:38,285 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1261625493, now seen corresponding path program 106 times [2021-06-05 23:03:38,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:38,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741841] [2021-06-05 23:03:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:38,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:38,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741841] [2021-06-05 23:03:38,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957077068] [2021-06-05 23:03:38,569 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:38,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:03:38,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:38,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:03:38,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:38,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957077068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:38,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:38,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:38,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920116209] [2021-06-05 23:03:38,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:38,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:38,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:38,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:38,995 INFO L87 Difference]: Start difference. First operand 758 states and 1646 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:41,566 INFO L93 Difference]: Finished difference Result 1225 states and 2500 transitions. [2021-06-05 23:03:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 23:03:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:41,567 INFO L225 Difference]: With dead ends: 1225 [2021-06-05 23:03:41,567 INFO L226 Difference]: Without dead ends: 1187 [2021-06-05 23:03:41,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 2435.2ms TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 23:03:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-05 23:03:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 760. [2021-06-05 23:03:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.1739130434782608) internal successors, (1650), 759 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1650 transitions. [2021-06-05 23:03:41,575 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1650 transitions. Word has length 39 [2021-06-05 23:03:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:41,575 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 1650 transitions. [2021-06-05 23:03:41,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1650 transitions. [2021-06-05 23:03:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:41,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:41,576 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:41,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:41,781 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash -429200977, now seen corresponding path program 107 times [2021-06-05 23:03:41,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:41,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107151862] [2021-06-05 23:03:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:42,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107151862] [2021-06-05 23:03:42,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107151862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115838871] [2021-06-05 23:03:42,074 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:42,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:03:42,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:42,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:03:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:42,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115838871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:42,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:42,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:42,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217752522] [2021-06-05 23:03:42,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:42,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:42,519 INFO L87 Difference]: Start difference. First operand 760 states and 1650 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:45,470 INFO L93 Difference]: Finished difference Result 1282 states and 2603 transitions. [2021-06-05 23:03:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 23:03:45,470 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:45,471 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 23:03:45,472 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 23:03:45,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 2684.5ms TimeCoverageRelationStatistics Valid=1736, Invalid=12306, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 23:03:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 23:03:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 763. [2021-06-05 23:03:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.1758530183727034) internal successors, (1658), 762 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1658 transitions. [2021-06-05 23:03:45,487 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1658 transitions. Word has length 39 [2021-06-05 23:03:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:45,487 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1658 transitions. [2021-06-05 23:03:45,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1658 transitions. [2021-06-05 23:03:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:45,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:45,488 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:45,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 23:03:45,688 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1694128837, now seen corresponding path program 108 times [2021-06-05 23:03:45,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:45,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465102139] [2021-06-05 23:03:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:45,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:45,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465102139] [2021-06-05 23:03:45,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465102139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:45,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934981468] [2021-06-05 23:03:45,971 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:45,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:03:45,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:45,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 23:03:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:46,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934981468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:46,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:46,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:46,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980219297] [2021-06-05 23:03:46,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:46,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:46,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:46,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:46,595 INFO L87 Difference]: Start difference. First operand 763 states and 1658 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:50,106 INFO L93 Difference]: Finished difference Result 1163 states and 2364 transitions. [2021-06-05 23:03:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 23:03:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:50,107 INFO L225 Difference]: With dead ends: 1163 [2021-06-05 23:03:50,108 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 23:03:50,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 3228.5ms TimeCoverageRelationStatistics Valid=1767, Invalid=12513, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:03:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 23:03:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 782. [2021-06-05 23:03:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.17797695262484) internal successors, (1701), 781 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1701 transitions. [2021-06-05 23:03:50,115 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1701 transitions. Word has length 39 [2021-06-05 23:03:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:50,115 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1701 transitions. [2021-06-05 23:03:50,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1701 transitions. [2021-06-05 23:03:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:50,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:50,116 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:50,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:50,317 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash 318889065, now seen corresponding path program 109 times [2021-06-05 23:03:50,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:50,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829576079] [2021-06-05 23:03:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:50,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:50,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829576079] [2021-06-05 23:03:50,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829576079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:50,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062911422] [2021-06-05 23:03:50,562 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:50,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:03:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:50,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062911422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:50,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:50,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:50,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385825234] [2021-06-05 23:03:50,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:50,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:50,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:50,999 INFO L87 Difference]: Start difference. First operand 782 states and 1701 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:53,104 INFO L93 Difference]: Finished difference Result 1209 states and 2470 transitions. [2021-06-05 23:03:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:03:53,105 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:53,106 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 23:03:53,106 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 23:03:53,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 1993.0ms TimeCoverageRelationStatistics Valid=1134, Invalid=8766, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 23:03:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 23:03:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 784. [2021-06-05 23:03:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.177522349936143) internal successors, (1705), 783 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1705 transitions. [2021-06-05 23:03:53,113 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1705 transitions. Word has length 39 [2021-06-05 23:03:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:53,113 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1705 transitions. [2021-06-05 23:03:53,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1705 transitions. [2021-06-05 23:03:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:53,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:53,114 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:53,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:53,315 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:53,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1349051565, now seen corresponding path program 110 times [2021-06-05 23:03:53,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:53,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074777855] [2021-06-05 23:03:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:53,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:53,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074777855] [2021-06-05 23:03:53,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074777855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:53,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862779912] [2021-06-05 23:03:53,582 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:53,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:53,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:53,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:03:53,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:54,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862779912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:54,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:54,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:54,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978926577] [2021-06-05 23:03:54,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:54,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:54,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:54,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:54,023 INFO L87 Difference]: Start difference. First operand 784 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:56,373 INFO L93 Difference]: Finished difference Result 1212 states and 2490 transitions. [2021-06-05 23:03:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:03:56,373 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:03:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:56,374 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 23:03:56,374 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 23:03:56,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 2126.6ms TimeCoverageRelationStatistics Valid=1265, Invalid=9655, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 23:03:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 23:03:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 794. [2021-06-05 23:03:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.1853720050441363) internal successors, (1733), 793 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1733 transitions. [2021-06-05 23:03:56,382 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1733 transitions. Word has length 39 [2021-06-05 23:03:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:56,382 INFO L482 AbstractCegarLoop]: Abstraction has 794 states and 1733 transitions. [2021-06-05 23:03:56,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1733 transitions. [2021-06-05 23:03:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:03:56,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:56,382 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:56,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 23:03:56,583 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:56,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:56,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1849872911, now seen corresponding path program 111 times [2021-06-05 23:03:56,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:56,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107074099] [2021-06-05 23:03:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:56,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:56,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107074099] [2021-06-05 23:03:56,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107074099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:56,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36505184] [2021-06-05 23:03:56,853 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:56,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:03:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:56,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:03:56,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:57,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36505184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:57,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:57,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:03:57,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70723116] [2021-06-05 23:03:57,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:03:57,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:57,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:03:57,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:03:57,454 INFO L87 Difference]: Start difference. First operand 794 states and 1733 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:00,514 INFO L93 Difference]: Finished difference Result 1224 states and 2528 transitions. [2021-06-05 23:04:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 23:04:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:00,515 INFO L225 Difference]: With dead ends: 1224 [2021-06-05 23:04:00,515 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 23:04:00,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 2901.0ms TimeCoverageRelationStatistics Valid=1462, Invalid=11878, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 23:04:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 23:04:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 804. [2021-06-05 23:04:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.1930261519302614) internal successors, (1761), 803 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1761 transitions. [2021-06-05 23:04:00,523 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1761 transitions. Word has length 39 [2021-06-05 23:04:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:00,523 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 1761 transitions. [2021-06-05 23:04:00,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1761 transitions. [2021-06-05 23:04:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:00,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:00,524 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:00,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 23:04:00,724 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:00,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:00,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1017448395, now seen corresponding path program 112 times [2021-06-05 23:04:00,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:00,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390616875] [2021-06-05 23:04:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:01,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:01,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390616875] [2021-06-05 23:04:01,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390616875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:01,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162629905] [2021-06-05 23:04:01,010 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:01,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:04:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:01,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:01,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162629905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:01,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:01,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:01,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557891392] [2021-06-05 23:04:01,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:01,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:01,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:01,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:01,461 INFO L87 Difference]: Start difference. First operand 804 states and 1761 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:04,121 INFO L93 Difference]: Finished difference Result 1310 states and 2688 transitions. [2021-06-05 23:04:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 23:04:04,121 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:04,122 INFO L225 Difference]: With dead ends: 1310 [2021-06-05 23:04:04,122 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 23:04:04,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3959 ImplicationChecksByTransitivity, 2532.7ms TimeCoverageRelationStatistics Valid=1571, Invalid=11311, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 23:04:04,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 23:04:04,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 808. [2021-06-05 23:04:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.195786864931846) internal successors, (1772), 807 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1772 transitions. [2021-06-05 23:04:04,131 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1772 transitions. Word has length 39 [2021-06-05 23:04:04,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:04,131 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 1772 transitions. [2021-06-05 23:04:04,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1772 transitions. [2021-06-05 23:04:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:04,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:04,131 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:04,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:04,332 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2012591041, now seen corresponding path program 113 times [2021-06-05 23:04:04,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:04,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816162372] [2021-06-05 23:04:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:04,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:04,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816162372] [2021-06-05 23:04:04,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816162372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:04,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53320236] [2021-06-05 23:04:04,610 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:04,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:04:04,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:04,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:05,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53320236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:05,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:05,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:05,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133275058] [2021-06-05 23:04:05,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:05,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:05,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:05,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:05,060 INFO L87 Difference]: Start difference. First operand 808 states and 1772 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:07,525 INFO L93 Difference]: Finished difference Result 1169 states and 2413 transitions. [2021-06-05 23:04:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:04:07,525 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:07,526 INFO L225 Difference]: With dead ends: 1169 [2021-06-05 23:04:07,526 INFO L226 Difference]: Without dead ends: 1142 [2021-06-05 23:04:07,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 2349.9ms TimeCoverageRelationStatistics Valid=1492, Invalid=9638, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 23:04:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-05 23:04:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 774. [2021-06-05 23:04:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.179818887451488) internal successors, (1685), 773 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1685 transitions. [2021-06-05 23:04:07,534 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1685 transitions. Word has length 39 [2021-06-05 23:04:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:07,534 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1685 transitions. [2021-06-05 23:04:07,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1685 transitions. [2021-06-05 23:04:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:07,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:07,535 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:07,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:07,749 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:07,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1299362665, now seen corresponding path program 114 times [2021-06-05 23:04:07,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:07,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142407345] [2021-06-05 23:04:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:08,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:08,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142407345] [2021-06-05 23:04:08,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142407345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:08,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593856133] [2021-06-05 23:04:08,001 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:08,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:04:08,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:08,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 23:04:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:08,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593856133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:08,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:08,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:08,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697482341] [2021-06-05 23:04:08,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:08,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:08,461 INFO L87 Difference]: Start difference. First operand 774 states and 1685 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:10,653 INFO L93 Difference]: Finished difference Result 1152 states and 2354 transitions. [2021-06-05 23:04:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:04:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:10,654 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 23:04:10,654 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 23:04:10,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 2208.1ms TimeCoverageRelationStatistics Valid=1243, Invalid=9887, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 23:04:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 23:04:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 776. [2021-06-05 23:04:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.1793548387096773) internal successors, (1689), 775 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1689 transitions. [2021-06-05 23:04:10,661 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1689 transitions. Word has length 39 [2021-06-05 23:04:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:10,661 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 1689 transitions. [2021-06-05 23:04:10,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1689 transitions. [2021-06-05 23:04:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:10,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:10,662 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:10,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:10,863 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1899561811, now seen corresponding path program 115 times [2021-06-05 23:04:10,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:10,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720561437] [2021-06-05 23:04:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:11,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:11,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720561437] [2021-06-05 23:04:11,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720561437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:11,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071995214] [2021-06-05 23:04:11,136 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:11,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:11,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:11,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071995214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:11,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:11,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:11,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285357222] [2021-06-05 23:04:11,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:11,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:11,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:11,596 INFO L87 Difference]: Start difference. First operand 776 states and 1689 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:14,015 INFO L93 Difference]: Finished difference Result 1157 states and 2374 transitions. [2021-06-05 23:04:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:04:14,015 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:14,016 INFO L225 Difference]: With dead ends: 1157 [2021-06-05 23:04:14,016 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 23:04:14,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 2295.9ms TimeCoverageRelationStatistics Valid=1411, Invalid=10799, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 23:04:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 23:04:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 782. [2021-06-05 23:04:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.183098591549296) internal successors, (1705), 781 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1705 transitions. [2021-06-05 23:04:14,023 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1705 transitions. Word has length 39 [2021-06-05 23:04:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:14,023 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1705 transitions. [2021-06-05 23:04:14,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1705 transitions. [2021-06-05 23:04:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:14,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:14,024 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:14,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 23:04:14,224 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1067137295, now seen corresponding path program 116 times [2021-06-05 23:04:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:14,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51072382] [2021-06-05 23:04:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:14,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:14,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51072382] [2021-06-05 23:04:14,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51072382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:14,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937771798] [2021-06-05 23:04:14,543 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:14,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:04:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:14,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:14,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:14,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937771798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:14,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:14,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:14,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752276776] [2021-06-05 23:04:14,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:14,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:14,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:14,989 INFO L87 Difference]: Start difference. First operand 782 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:17,618 INFO L93 Difference]: Finished difference Result 1249 states and 2546 transitions. [2021-06-05 23:04:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 23:04:17,618 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:17,619 INFO L225 Difference]: With dead ends: 1249 [2021-06-05 23:04:17,619 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 23:04:17,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4088 ImplicationChecksByTransitivity, 2592.6ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 23:04:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 23:04:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 786. [2021-06-05 23:04:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.1859872611464968) internal successors, (1716), 785 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1716 transitions. [2021-06-05 23:04:17,627 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1716 transitions. Word has length 39 [2021-06-05 23:04:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:17,628 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1716 transitions. [2021-06-05 23:04:17,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1716 transitions. [2021-06-05 23:04:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:17,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:17,628 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:17,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 23:04:17,829 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1962902141, now seen corresponding path program 117 times [2021-06-05 23:04:17,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:17,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267762077] [2021-06-05 23:04:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:18,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:18,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267762077] [2021-06-05 23:04:18,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267762077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:18,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727253158] [2021-06-05 23:04:18,108 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:18,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:04:18,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:18,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:04:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:18,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727253158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:18,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:18,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981754775] [2021-06-05 23:04:18,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:18,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:18,796 INFO L87 Difference]: Start difference. First operand 786 states and 1716 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:22,627 INFO L93 Difference]: Finished difference Result 1162 states and 2375 transitions. [2021-06-05 23:04:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 23:04:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:22,629 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 23:04:22,629 INFO L226 Difference]: Without dead ends: 1121 [2021-06-05 23:04:22,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 3563.0ms TimeCoverageRelationStatistics Valid=1607, Invalid=12673, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:04:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-05 23:04:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 604. [2021-06-05 23:04:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.1160862354892207) internal successors, (1276), 603 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1276 transitions. [2021-06-05 23:04:22,635 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1276 transitions. Word has length 39 [2021-06-05 23:04:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:22,635 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1276 transitions. [2021-06-05 23:04:22,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1276 transitions. [2021-06-05 23:04:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:22,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:22,636 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:22,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:22,836 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1278036585, now seen corresponding path program 118 times [2021-06-05 23:04:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:22,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001991603] [2021-06-05 23:04:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:23,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:23,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001991603] [2021-06-05 23:04:23,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001991603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:23,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570891800] [2021-06-05 23:04:23,094 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:23,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:04:23,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:23,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:23,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570891800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:23,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:23,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:23,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124873638] [2021-06-05 23:04:23,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:23,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:23,534 INFO L87 Difference]: Start difference. First operand 604 states and 1276 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:25,891 INFO L93 Difference]: Finished difference Result 922 states and 1823 transitions. [2021-06-05 23:04:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:04:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:25,892 INFO L225 Difference]: With dead ends: 922 [2021-06-05 23:04:25,892 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 23:04:25,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2323.2ms TimeCoverageRelationStatistics Valid=1385, Invalid=11047, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 23:04:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 23:04:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 606. [2021-06-05 23:04:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.115702479338843) internal successors, (1280), 605 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1280 transitions. [2021-06-05 23:04:25,899 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1280 transitions. Word has length 39 [2021-06-05 23:04:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:25,899 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1280 transitions. [2021-06-05 23:04:25,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1280 transitions. [2021-06-05 23:04:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:25,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:25,900 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:26,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-06-05 23:04:26,101 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2110461101, now seen corresponding path program 119 times [2021-06-05 23:04:26,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:26,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275951251] [2021-06-05 23:04:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:26,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:26,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275951251] [2021-06-05 23:04:26,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275951251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:26,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252071457] [2021-06-05 23:04:26,388 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:26,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:04:26,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:26,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:26,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:26,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252071457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:26,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:26,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:26,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216611982] [2021-06-05 23:04:26,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:26,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:26,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:26,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:26,828 INFO L87 Difference]: Start difference. First operand 606 states and 1280 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:29,469 INFO L93 Difference]: Finished difference Result 1010 states and 1983 transitions. [2021-06-05 23:04:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 23:04:29,469 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:29,470 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 23:04:29,470 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 23:04:29,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4228 ImplicationChecksByTransitivity, 2582.6ms TimeCoverageRelationStatistics Valid=1571, Invalid=11769, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 23:04:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 23:04:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 608. [2021-06-05 23:04:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 2.116968698517298) internal successors, (1285), 607 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1285 transitions. [2021-06-05 23:04:29,477 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1285 transitions. Word has length 39 [2021-06-05 23:04:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:29,477 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1285 transitions. [2021-06-05 23:04:29,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1285 transitions. [2021-06-05 23:04:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:29,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:29,477 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:29,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 23:04:29,678 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash 845533241, now seen corresponding path program 120 times [2021-06-05 23:04:29,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:29,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445799550] [2021-06-05 23:04:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:29,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445799550] [2021-06-05 23:04:29,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445799550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792068543] [2021-06-05 23:04:29,956 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:29,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:04:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:29,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 23:04:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:30,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792068543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:30,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:30,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:30,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906172237] [2021-06-05 23:04:30,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:30,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:30,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:30,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:30,506 INFO L87 Difference]: Start difference. First operand 608 states and 1285 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:33,676 INFO L93 Difference]: Finished difference Result 1026 states and 2029 transitions. [2021-06-05 23:04:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 23:04:33,676 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:33,677 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 23:04:33,677 INFO L226 Difference]: Without dead ends: 978 [2021-06-05 23:04:33,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 2922.0ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 23:04:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-06-05 23:04:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 595. [2021-06-05 23:04:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.1026936026936025) internal successors, (1249), 594 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1249 transitions. [2021-06-05 23:04:33,683 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1249 transitions. Word has length 39 [2021-06-05 23:04:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:33,683 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1249 transitions. [2021-06-05 23:04:33,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1249 transitions. [2021-06-05 23:04:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:33,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:33,684 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:33,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:33,884 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 379691369, now seen corresponding path program 121 times [2021-06-05 23:04:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:33,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339607461] [2021-06-05 23:04:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:34,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:34,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339607461] [2021-06-05 23:04:34,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339607461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:34,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322220729] [2021-06-05 23:04:34,121 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:34,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:34,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322220729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:34,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:34,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 23:04:34,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276923695] [2021-06-05 23:04:34,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:04:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:04:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:04:34,582 INFO L87 Difference]: Start difference. First operand 595 states and 1249 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:37,765 INFO L93 Difference]: Finished difference Result 1028 states and 2059 transitions. [2021-06-05 23:04:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 23:04:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:37,766 INFO L225 Difference]: With dead ends: 1028 [2021-06-05 23:04:37,766 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 23:04:37,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5278 ImplicationChecksByTransitivity, 2954.7ms TimeCoverageRelationStatistics Valid=1778, Invalid=13972, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 23:04:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 23:04:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 605. [2021-06-05 23:04:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.1009933774834435) internal successors, (1269), 604 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1269 transitions. [2021-06-05 23:04:37,772 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1269 transitions. Word has length 39 [2021-06-05 23:04:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:37,772 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1269 transitions. [2021-06-05 23:04:37,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1269 transitions. [2021-06-05 23:04:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:37,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:37,773 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:37,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 23:04:37,973 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash -115557073, now seen corresponding path program 122 times [2021-06-05 23:04:37,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:37,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311271207] [2021-06-05 23:04:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:04:38,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:38,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311271207] [2021-06-05 23:04:38,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311271207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:38,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662820249] [2021-06-05 23:04:38,182 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:38,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:04:38,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:38,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:38,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662820249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:38,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:38,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-05 23:04:38,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564639577] [2021-06-05 23:04:38,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:04:38,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:38,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:04:38,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:04:38,627 INFO L87 Difference]: Start difference. First operand 605 states and 1269 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:41,355 INFO L93 Difference]: Finished difference Result 1122 states and 2231 transitions. [2021-06-05 23:04:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 23:04:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:41,356 INFO L225 Difference]: With dead ends: 1122 [2021-06-05 23:04:41,356 INFO L226 Difference]: Without dead ends: 1043 [2021-06-05 23:04:41,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 2532.2ms TimeCoverageRelationStatistics Valid=1670, Invalid=11902, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 23:04:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-06-05 23:04:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 576. [2021-06-05 23:04:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-06-05 23:04:41,363 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 39 [2021-06-05 23:04:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:41,363 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-06-05 23:04:41,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-06-05 23:04:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:41,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:41,363 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:41,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:41,564 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2015955197, now seen corresponding path program 123 times [2021-06-05 23:04:41,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:41,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506454334] [2021-06-05 23:04:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:41,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:41,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506454334] [2021-06-05 23:04:41,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506454334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:41,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400251247] [2021-06-05 23:04:41,856 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:41,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:04:41,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:41,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 23:04:41,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:42,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400251247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:42,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:42,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-06-05 23:04:42,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292354988] [2021-06-05 23:04:42,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:04:42,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:04:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:04:42,425 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:46,974 INFO L93 Difference]: Finished difference Result 956 states and 1931 transitions. [2021-06-05 23:04:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 23:04:46,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:46,975 INFO L225 Difference]: With dead ends: 956 [2021-06-05 23:04:46,976 INFO L226 Difference]: Without dead ends: 917 [2021-06-05 23:04:46,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 4212.4ms TimeCoverageRelationStatistics Valid=1504, Invalid=12776, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:04:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-06-05 23:04:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 508. [2021-06-05 23:04:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.078895463510848) internal successors, (1054), 507 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1054 transitions. [2021-06-05 23:04:46,981 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1054 transitions. Word has length 39 [2021-06-05 23:04:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:46,981 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1054 transitions. [2021-06-05 23:04:46,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1054 transitions. [2021-06-05 23:04:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:04:46,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:46,982 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:47,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 23:04:47,182 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:47,182 INFO L82 PathProgramCache]: Analyzing trace with hash 963177715, now seen corresponding path program 124 times [2021-06-05 23:04:47,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:47,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87205918] [2021-06-05 23:04:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:47,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87205918] [2021-06-05 23:04:47,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87205918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504486155] [2021-06-05 23:04:47,524 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:47,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:04:47,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:47,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:04:47,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:48,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504486155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:48,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:48,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-06-05 23:04:48,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042642261] [2021-06-05 23:04:48,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:04:48,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:04:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:04:48,111 INFO L87 Difference]: Start difference. First operand 508 states and 1054 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:49,508 INFO L93 Difference]: Finished difference Result 1041 states and 2115 transitions. [2021-06-05 23:04:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:04:49,509 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:04:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:49,510 INFO L225 Difference]: With dead ends: 1041 [2021-06-05 23:04:49,510 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 23:04:49,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1243.3ms TimeCoverageRelationStatistics Valid=262, Invalid=3160, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:04:49,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 23:04:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 524. [2021-06-05 23:04:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.0764818355640537) internal successors, (1086), 523 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1086 transitions. [2021-06-05 23:04:49,516 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1086 transitions. Word has length 39 [2021-06-05 23:04:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:49,516 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1086 transitions. [2021-06-05 23:04:49,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1086 transitions. [2021-06-05 23:04:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:04:49,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:49,517 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:49,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:49,717 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash -892338777, now seen corresponding path program 125 times [2021-06-05 23:04:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:49,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445289515] [2021-06-05 23:04:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:04:49,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:49,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445289515] [2021-06-05 23:04:49,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445289515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:49,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318160840] [2021-06-05 23:04:49,779 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:49,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:04:49,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:49,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:04:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:04:49,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318160840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:49,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:49,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 23:04:49,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355544598] [2021-06-05 23:04:49,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:04:49,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:04:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:04:49,864 INFO L87 Difference]: Start difference. First operand 524 states and 1086 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:49,997 INFO L93 Difference]: Finished difference Result 816 states and 1639 transitions. [2021-06-05 23:04:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:04:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:04:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:49,998 INFO L225 Difference]: With dead ends: 816 [2021-06-05 23:04:49,998 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 23:04:49,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:04:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 23:04:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-06-05 23:04:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.08273381294964) internal successors, (1158), 556 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1158 transitions. [2021-06-05 23:04:50,003 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1158 transitions. Word has length 41 [2021-06-05 23:04:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:50,003 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1158 transitions. [2021-06-05 23:04:50,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1158 transitions. [2021-06-05 23:04:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:04:50,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:50,004 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:50,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 23:04:50,206 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash 141760501, now seen corresponding path program 126 times [2021-06-05 23:04:50,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:50,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16565077] [2021-06-05 23:04:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:50,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:50,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16565077] [2021-06-05 23:04:50,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16565077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:50,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448763998] [2021-06-05 23:04:50,527 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:50,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:04:50,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:50,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 23:04:50,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:51,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448763998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:51,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:51,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-05 23:04:51,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871119118] [2021-06-05 23:04:51,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:04:51,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:04:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:04:51,102 INFO L87 Difference]: Start difference. First operand 557 states and 1158 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:57,951 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 23:04:59,395 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 23:04:59,552 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 23:04:59,689 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 23:05:00,739 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 23:05:00,939 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 23:05:01,080 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 23:05:01,266 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 23:05:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:07,529 INFO L93 Difference]: Finished difference Result 2491 states and 4951 transitions. [2021-06-05 23:05:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2021-06-05 23:05:07,530 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:05:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:07,532 INFO L225 Difference]: With dead ends: 2491 [2021-06-05 23:05:07,532 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 23:05:07,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32989 ImplicationChecksByTransitivity, 14266.5ms TimeCoverageRelationStatistics Valid=8903, Invalid=67549, Unknown=0, NotChecked=0, Total=76452 [2021-06-05 23:05:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 23:05:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 830. [2021-06-05 23:05:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.1049457177322073) internal successors, (1745), 829 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1745 transitions. [2021-06-05 23:05:07,561 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1745 transitions. Word has length 41 [2021-06-05 23:05:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:07,561 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 1745 transitions. [2021-06-05 23:05:07,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1745 transitions. [2021-06-05 23:05:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:05:07,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:07,562 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:07,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:07,765 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2063910491, now seen corresponding path program 127 times [2021-06-05 23:05:07,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:07,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103160139] [2021-06-05 23:05:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:05:08,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:08,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103160139] [2021-06-05 23:05:08,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103160139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:08,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406291039] [2021-06-05 23:05:08,018 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:08,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:05:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:08,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406291039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:08,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:08,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-06-05 23:05:08,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461782034] [2021-06-05 23:05:08,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:05:08,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:05:08,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:05:08,548 INFO L87 Difference]: Start difference. First operand 830 states and 1745 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:11,179 INFO L93 Difference]: Finished difference Result 1299 states and 2636 transitions. [2021-06-05 23:05:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:05:11,180 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:05:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:11,181 INFO L225 Difference]: With dead ends: 1299 [2021-06-05 23:05:11,181 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 23:05:11,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 2357.8ms TimeCoverageRelationStatistics Valid=743, Invalid=9969, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 23:05:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 23:05:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 857. [2021-06-05 23:05:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.100467289719626) internal successors, (1798), 856 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1798 transitions. [2021-06-05 23:05:11,189 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1798 transitions. Word has length 41 [2021-06-05 23:05:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:11,189 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 1798 transitions. [2021-06-05 23:05:11,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1798 transitions. [2021-06-05 23:05:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:05:11,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:11,190 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:11,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 23:05:11,391 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash -670644875, now seen corresponding path program 128 times [2021-06-05 23:05:11,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:11,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945717130] [2021-06-05 23:05:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:05:11,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:11,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945717130] [2021-06-05 23:05:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945717130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:11,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019954438] [2021-06-05 23:05:11,617 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:11,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:05:11,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:11,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:05:11,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019954438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:12,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:12,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 23:05:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825144766] [2021-06-05 23:05:12,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:12,156 INFO L87 Difference]: Start difference. First operand 857 states and 1798 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:14,419 INFO L93 Difference]: Finished difference Result 1376 states and 2792 transitions. [2021-06-05 23:05:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:05:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:05:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:14,421 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 23:05:14,421 INFO L226 Difference]: Without dead ends: 1337 [2021-06-05 23:05:14,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 1921.5ms TimeCoverageRelationStatistics Valid=666, Invalid=7890, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 23:05:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-06-05 23:05:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 848. [2021-06-05 23:05:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 2.0968122786304604) internal successors, (1776), 847 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1776 transitions. [2021-06-05 23:05:14,429 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1776 transitions. Word has length 41 [2021-06-05 23:05:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:14,430 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 1776 transitions. [2021-06-05 23:05:14,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1776 transitions. [2021-06-05 23:05:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:05:14,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:14,430 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:14,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:14,631 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:14,631 INFO L82 PathProgramCache]: Analyzing trace with hash 34337835, now seen corresponding path program 129 times [2021-06-05 23:05:14,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:14,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306325218] [2021-06-05 23:05:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:05:14,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:14,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306325218] [2021-06-05 23:05:14,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306325218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:14,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167603310] [2021-06-05 23:05:14,918 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:14,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:05:14,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:14,947 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:05:14,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:15,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167603310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:15,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:15,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-05 23:05:15,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652656984] [2021-06-05 23:05:15,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:15,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:15,417 INFO L87 Difference]: Start difference. First operand 848 states and 1776 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:17,604 INFO L93 Difference]: Finished difference Result 1147 states and 2347 transitions. [2021-06-05 23:05:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:05:17,605 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:05:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:17,606 INFO L225 Difference]: With dead ends: 1147 [2021-06-05 23:05:17,606 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 23:05:17,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 1938.8ms TimeCoverageRelationStatistics Valid=561, Invalid=7449, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:05:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 23:05:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 744. [2021-06-05 23:05:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.1049798115746974) internal successors, (1564), 743 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1564 transitions. [2021-06-05 23:05:17,613 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1564 transitions. Word has length 41 [2021-06-05 23:05:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:17,613 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 1564 transitions. [2021-06-05 23:05:17,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1564 transitions. [2021-06-05 23:05:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:05:17,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:17,614 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:17,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 23:05:17,823 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash -749611727, now seen corresponding path program 130 times [2021-06-05 23:05:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:17,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290284251] [2021-06-05 23:05:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:05:18,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:18,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290284251] [2021-06-05 23:05:18,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290284251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:18,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041683115] [2021-06-05 23:05:18,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:18,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:05:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:18,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 23:05:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:18,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041683115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:18,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:18,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 23:05:18,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50030462] [2021-06-05 23:05:18,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:18,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:18,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:18,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:18,542 INFO L87 Difference]: Start difference. First operand 744 states and 1564 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:19,750 INFO L93 Difference]: Finished difference Result 1254 states and 2587 transitions. [2021-06-05 23:05:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:05:19,750 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:05:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:19,751 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 23:05:19,751 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 23:05:19,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1167.6ms TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:05:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 23:05:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 653. [2021-06-05 23:05:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.1165644171779143) internal successors, (1380), 652 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1380 transitions. [2021-06-05 23:05:19,758 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1380 transitions. Word has length 41 [2021-06-05 23:05:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:19,758 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1380 transitions. [2021-06-05 23:05:19,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1380 transitions. [2021-06-05 23:05:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:05:19,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:19,759 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:19,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:19,960 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2073348345, now seen corresponding path program 131 times [2021-06-05 23:05:19,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:19,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590686524] [2021-06-05 23:05:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590686524] [2021-06-05 23:05:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590686524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365382547] [2021-06-05 23:05:20,216 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:20,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:05:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:20,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 23:05:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:20,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365382547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:20,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:20,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2021-06-05 23:05:20,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827222868] [2021-06-05 23:05:20,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:05:20,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:20,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:05:20,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:05:20,783 INFO L87 Difference]: Start difference. First operand 653 states and 1380 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:30,652 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 23:05:31,272 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-06-05 23:05:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:32,541 INFO L93 Difference]: Finished difference Result 2177 states and 4455 transitions. [2021-06-05 23:05:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-06-05 23:05:32,542 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:05:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:32,543 INFO L225 Difference]: With dead ends: 2177 [2021-06-05 23:05:32,543 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 23:05:32,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17707 ImplicationChecksByTransitivity, 10198.0ms TimeCoverageRelationStatistics Valid=4996, Invalid=38894, Unknown=0, NotChecked=0, Total=43890 [2021-06-05 23:05:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 23:05:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 701. [2021-06-05 23:05:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.1085714285714285) internal successors, (1476), 700 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1476 transitions. [2021-06-05 23:05:32,554 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1476 transitions. Word has length 41 [2021-06-05 23:05:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:32,554 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 1476 transitions. [2021-06-05 23:05:32,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1476 transitions. [2021-06-05 23:05:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:32,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:32,555 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:32,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 23:05:32,755 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 132 times [2021-06-05 23:05:32,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:32,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440919885] [2021-06-05 23:05:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:33,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440919885] [2021-06-05 23:05:33,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440919885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:33,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596571221] [2021-06-05 23:05:33,050 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:33,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:05:33,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:33,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 23:05:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:33,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596571221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:33,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:33,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:05:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974114234] [2021-06-05 23:05:33,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:05:33,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:33,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:05:33,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:05:33,713 INFO L87 Difference]: Start difference. First operand 701 states and 1476 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:36,289 INFO L93 Difference]: Finished difference Result 1425 states and 2940 transitions. [2021-06-05 23:05:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:05:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:05:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:36,290 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 23:05:36,290 INFO L226 Difference]: Without dead ends: 1352 [2021-06-05 23:05:36,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 2666.2ms TimeCoverageRelationStatistics Valid=1356, Invalid=9564, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 23:05:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-06-05 23:05:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 879. [2021-06-05 23:05:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.1890660592255125) internal successors, (1922), 878 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1922 transitions. [2021-06-05 23:05:36,304 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1922 transitions. Word has length 43 [2021-06-05 23:05:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:36,304 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 1922 transitions. [2021-06-05 23:05:36,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1922 transitions. [2021-06-05 23:05:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:36,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:36,305 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:36,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-05 23:05:36,529 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1027861339, now seen corresponding path program 133 times [2021-06-05 23:05:36,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:36,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038070155] [2021-06-05 23:05:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:36,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:36,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038070155] [2021-06-05 23:05:36,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038070155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:36,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986188794] [2021-06-05 23:05:36,814 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:36,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:05:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:37,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986188794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:37,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:37,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:05:37,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359425498] [2021-06-05 23:05:37,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:05:37,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:37,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:05:37,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:05:37,322 INFO L87 Difference]: Start difference. First operand 879 states and 1922 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:39,774 INFO L93 Difference]: Finished difference Result 1463 states and 3003 transitions. [2021-06-05 23:05:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:05:39,774 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:05:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:39,775 INFO L225 Difference]: With dead ends: 1463 [2021-06-05 23:05:39,775 INFO L226 Difference]: Without dead ends: 1401 [2021-06-05 23:05:39,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 2381.6ms TimeCoverageRelationStatistics Valid=1457, Invalid=10533, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 23:05:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-05 23:05:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 881. [2021-06-05 23:05:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1886363636363635) internal successors, (1926), 880 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1926 transitions. [2021-06-05 23:05:39,786 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1926 transitions. Word has length 43 [2021-06-05 23:05:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:39,786 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1926 transitions. [2021-06-05 23:05:39,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1926 transitions. [2021-06-05 23:05:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:39,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:39,787 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:39,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 23:05:39,987 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash -475713121, now seen corresponding path program 134 times [2021-06-05 23:05:39,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:39,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540114050] [2021-06-05 23:05:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:40,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:40,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540114050] [2021-06-05 23:05:40,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540114050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:40,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234245507] [2021-06-05 23:05:40,278 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:40,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:05:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:40,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:05:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:40,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234245507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:40,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:40,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:05:40,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510362337] [2021-06-05 23:05:40,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:05:40,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:40,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:05:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:05:40,788 INFO L87 Difference]: Start difference. First operand 881 states and 1926 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:43,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:43,437 INFO L93 Difference]: Finished difference Result 1461 states and 3001 transitions. [2021-06-05 23:05:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 23:05:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:05:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:43,438 INFO L225 Difference]: With dead ends: 1461 [2021-06-05 23:05:43,438 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 23:05:43,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2489.1ms TimeCoverageRelationStatistics Valid=1554, Invalid=11556, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 23:05:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 23:05:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 883. [2021-06-05 23:05:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 2.188208616780045) internal successors, (1930), 882 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1930 transitions. [2021-06-05 23:05:43,449 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1930 transitions. Word has length 43 [2021-06-05 23:05:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:43,449 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 1930 transitions. [2021-06-05 23:05:43,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1930 transitions. [2021-06-05 23:05:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:43,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:43,449 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:43,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 23:05:43,650 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1667971299, now seen corresponding path program 135 times [2021-06-05 23:05:43,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:43,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410745093] [2021-06-05 23:05:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:43,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:43,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410745093] [2021-06-05 23:05:43,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410745093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:43,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137198809] [2021-06-05 23:05:43,935 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:43,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:05:43,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:43,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:05:43,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:44,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137198809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:44,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:44,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:05:44,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396951991] [2021-06-05 23:05:44,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:05:44,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:05:44,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:05:44,445 INFO L87 Difference]: Start difference. First operand 883 states and 1930 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:47,183 INFO L93 Difference]: Finished difference Result 1459 states and 2999 transitions. [2021-06-05 23:05:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 23:05:47,183 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:05:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:47,185 INFO L225 Difference]: With dead ends: 1459 [2021-06-05 23:05:47,185 INFO L226 Difference]: Without dead ends: 1409 [2021-06-05 23:05:47,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 2603.2ms TimeCoverageRelationStatistics Valid=1676, Invalid=12604, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:05:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-06-05 23:05:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 885. [2021-06-05 23:05:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.1877828054298645) internal successors, (1934), 884 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1934 transitions. [2021-06-05 23:05:47,194 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1934 transitions. Word has length 43 [2021-06-05 23:05:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:47,194 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1934 transitions. [2021-06-05 23:05:47,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1934 transitions. [2021-06-05 23:05:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:47,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:47,195 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:47,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 23:05:47,396 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1596833497, now seen corresponding path program 136 times [2021-06-05 23:05:47,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:47,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602300670] [2021-06-05 23:05:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:47,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:47,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602300670] [2021-06-05 23:05:47,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602300670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:47,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113489533] [2021-06-05 23:05:47,679 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:47,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:05:47,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:47,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:05:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:48,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113489533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:48,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:48,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:05:48,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254403969] [2021-06-05 23:05:48,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:05:48,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:48,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:05:48,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:05:48,194 INFO L87 Difference]: Start difference. First operand 885 states and 1934 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:51,132 INFO L93 Difference]: Finished difference Result 1457 states and 2997 transitions. [2021-06-05 23:05:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 23:05:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:05:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:51,134 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 23:05:51,134 INFO L226 Difference]: Without dead ends: 1413 [2021-06-05 23:05:51,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 2718.7ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 23:05:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-05 23:05:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 887. [2021-06-05 23:05:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.1873589164785554) internal successors, (1938), 886 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1938 transitions. [2021-06-05 23:05:51,143 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1938 transitions. Word has length 43 [2021-06-05 23:05:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:51,144 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 1938 transitions. [2021-06-05 23:05:51,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1938 transitions. [2021-06-05 23:05:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:51,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:51,144 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:51,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 23:05:51,345 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash -500790677, now seen corresponding path program 137 times [2021-06-05 23:05:51,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:51,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345143164] [2021-06-05 23:05:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:51,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:51,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345143164] [2021-06-05 23:05:51,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345143164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:51,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609811159] [2021-06-05 23:05:51,632 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:51,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:05:51,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:51,660 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:05:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:52,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609811159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:52,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:52,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:05:52,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364542770] [2021-06-05 23:05:52,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:05:52,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:05:52,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:05:52,144 INFO L87 Difference]: Start difference. First operand 887 states and 1938 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:55,207 INFO L93 Difference]: Finished difference Result 1457 states and 2999 transitions. [2021-06-05 23:05:55,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 23:05:55,207 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:05:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:55,208 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 23:05:55,208 INFO L226 Difference]: Without dead ends: 1419 [2021-06-05 23:05:55,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5238 ImplicationChecksByTransitivity, 2866.3ms TimeCoverageRelationStatistics Valid=1995, Invalid=14775, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 23:05:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-05 23:05:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 889. [2021-06-05 23:05:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.186936936936937) internal successors, (1942), 888 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1942 transitions. [2021-06-05 23:05:55,242 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1942 transitions. Word has length 43 [2021-06-05 23:05:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:55,242 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 1942 transitions. [2021-06-05 23:05:55,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1942 transitions. [2021-06-05 23:05:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:55,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:55,243 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:55,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 23:05:55,457 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash 331633839, now seen corresponding path program 138 times [2021-06-05 23:05:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:55,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785820921] [2021-06-05 23:05:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:55,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:55,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785820921] [2021-06-05 23:05:55,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785820921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:55,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718680029] [2021-06-05 23:05:55,776 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:55,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:05:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:55,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:05:55,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:56,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718680029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:56,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:56,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:05:56,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011374336] [2021-06-05 23:05:56,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:05:56,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:56,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:05:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:05:56,329 INFO L87 Difference]: Start difference. First operand 889 states and 1942 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:59,815 INFO L93 Difference]: Finished difference Result 1520 states and 3112 transitions. [2021-06-05 23:05:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 23:05:59,815 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:05:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:59,816 INFO L225 Difference]: With dead ends: 1520 [2021-06-05 23:05:59,816 INFO L226 Difference]: Without dead ends: 1475 [2021-06-05 23:05:59,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 3237.5ms TimeCoverageRelationStatistics Valid=2173, Invalid=15649, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 23:05:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-05 23:05:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 892. [2021-06-05 23:05:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.1885521885521886) internal successors, (1950), 891 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1950 transitions. [2021-06-05 23:05:59,829 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1950 transitions. Word has length 43 [2021-06-05 23:05:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:59,829 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 1950 transitions. [2021-06-05 23:05:59,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:05:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1950 transitions. [2021-06-05 23:05:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:05:59,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:59,830 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:00,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 23:06:00,031 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:00,031 INFO L82 PathProgramCache]: Analyzing trace with hash -933294021, now seen corresponding path program 139 times [2021-06-05 23:06:00,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:00,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907826218] [2021-06-05 23:06:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:00,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:00,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907826218] [2021-06-05 23:06:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907826218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189931920] [2021-06-05 23:06:00,348 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:00,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:00,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189931920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:00,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:00,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672854323] [2021-06-05 23:06:00,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:00,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:00,928 INFO L87 Difference]: Start difference. First operand 892 states and 1950 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:03,943 INFO L93 Difference]: Finished difference Result 1310 states and 2689 transitions. [2021-06-05 23:06:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:06:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:03,945 INFO L225 Difference]: With dead ends: 1310 [2021-06-05 23:06:03,945 INFO L226 Difference]: Without dead ends: 1290 [2021-06-05 23:06:03,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4570 ImplicationChecksByTransitivity, 2941.5ms TimeCoverageRelationStatistics Valid=1991, Invalid=13015, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 23:06:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-06-05 23:06:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 893. [2021-06-05 23:06:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.188340807174888) internal successors, (1952), 892 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1952 transitions. [2021-06-05 23:06:03,954 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1952 transitions. Word has length 43 [2021-06-05 23:06:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:03,954 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 1952 transitions. [2021-06-05 23:06:03,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1952 transitions. [2021-06-05 23:06:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:03,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:03,955 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:04,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 23:06:04,155 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:04,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:04,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1154201253, now seen corresponding path program 140 times [2021-06-05 23:06:04,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:04,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089331544] [2021-06-05 23:06:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:04,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:04,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089331544] [2021-06-05 23:06:04,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089331544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:04,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701287309] [2021-06-05 23:06:04,439 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:04,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:06:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:04,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:04,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701287309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:04,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:04,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:04,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614930040] [2021-06-05 23:06:04,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:04,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:04,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:04,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:04,950 INFO L87 Difference]: Start difference. First operand 893 states and 1952 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:07,459 INFO L93 Difference]: Finished difference Result 1424 states and 2924 transitions. [2021-06-05 23:06:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 23:06:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:07,461 INFO L225 Difference]: With dead ends: 1424 [2021-06-05 23:06:07,461 INFO L226 Difference]: Without dead ends: 1368 [2021-06-05 23:06:07,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2339.5ms TimeCoverageRelationStatistics Valid=1364, Invalid=10626, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 23:06:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-06-05 23:06:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 899. [2021-06-05 23:06:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.1870824053452114) internal successors, (1964), 898 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1964 transitions. [2021-06-05 23:06:07,470 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1964 transitions. Word has length 43 [2021-06-05 23:06:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:07,470 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 1964 transitions. [2021-06-05 23:06:07,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1964 transitions. [2021-06-05 23:06:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:07,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:07,471 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:07,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:07,671 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -997081623, now seen corresponding path program 141 times [2021-06-05 23:06:07,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:07,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814418618] [2021-06-05 23:06:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:07,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:07,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814418618] [2021-06-05 23:06:07,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814418618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:07,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995221930] [2021-06-05 23:06:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:07,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:06:07,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:07,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:08,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995221930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:08,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:08,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:08,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797695748] [2021-06-05 23:06:08,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:08,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:08,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:08,480 INFO L87 Difference]: Start difference. First operand 899 states and 1964 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:11,159 INFO L93 Difference]: Finished difference Result 1429 states and 2948 transitions. [2021-06-05 23:06:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:06:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:11,161 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 23:06:11,161 INFO L226 Difference]: Without dead ends: 1379 [2021-06-05 23:06:11,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4011 ImplicationChecksByTransitivity, 2450.5ms TimeCoverageRelationStatistics Valid=1495, Invalid=11615, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 23:06:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-06-05 23:06:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 909. [2021-06-05 23:06:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.193832599118943) internal successors, (1992), 908 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1992 transitions. [2021-06-05 23:06:11,170 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1992 transitions. Word has length 43 [2021-06-05 23:06:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:11,170 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 1992 transitions. [2021-06-05 23:06:11,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1992 transitions. [2021-06-05 23:06:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:11,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:11,171 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:11,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:11,372 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 33080877, now seen corresponding path program 142 times [2021-06-05 23:06:11,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:11,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006605158] [2021-06-05 23:06:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:11,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006605158] [2021-06-05 23:06:11,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006605158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580502981] [2021-06-05 23:06:11,660 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:11,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:06:11,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:11,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:11,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:12,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580502981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:12,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:12,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:12,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884950532] [2021-06-05 23:06:12,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:12,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:12,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:12,165 INFO L87 Difference]: Start difference. First operand 909 states and 1992 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:14,813 INFO L93 Difference]: Finished difference Result 1441 states and 2986 transitions. [2021-06-05 23:06:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:06:14,814 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:14,815 INFO L225 Difference]: With dead ends: 1441 [2021-06-05 23:06:14,815 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 23:06:14,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 2549.4ms TimeCoverageRelationStatistics Valid=1642, Invalid=12638, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:06:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 23:06:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 919. [2021-06-05 23:06:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.2004357298474946) internal successors, (2020), 918 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2020 transitions. [2021-06-05 23:06:14,824 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2020 transitions. Word has length 43 [2021-06-05 23:06:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:14,824 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2020 transitions. [2021-06-05 23:06:14,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2020 transitions. [2021-06-05 23:06:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:14,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:14,825 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:15,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-06-05 23:06:15,026 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:15,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1129123697, now seen corresponding path program 143 times [2021-06-05 23:06:15,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:15,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118636502] [2021-06-05 23:06:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:15,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:15,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118636502] [2021-06-05 23:06:15,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118636502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:15,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138762238] [2021-06-05 23:06:15,304 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:15,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:06:15,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:15,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:15,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138762238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:15,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:15,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:15,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134216928] [2021-06-05 23:06:15,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:15,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:15,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:15,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:15,831 INFO L87 Difference]: Start difference. First operand 919 states and 2020 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:18,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:18,938 INFO L93 Difference]: Finished difference Result 1453 states and 3024 transitions. [2021-06-05 23:06:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:06:18,939 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:18,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:18,940 INFO L225 Difference]: With dead ends: 1453 [2021-06-05 23:06:18,940 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 23:06:18,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4823 ImplicationChecksByTransitivity, 2700.9ms TimeCoverageRelationStatistics Valid=1814, Invalid=13686, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 23:06:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 23:06:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 929. [2021-06-05 23:06:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.206896551724138) internal successors, (2048), 928 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2048 transitions. [2021-06-05 23:06:18,949 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2048 transitions. Word has length 43 [2021-06-05 23:06:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:18,949 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2048 transitions. [2021-06-05 23:06:18,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2048 transitions. [2021-06-05 23:06:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:18,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:18,950 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:19,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:19,153 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1961548213, now seen corresponding path program 144 times [2021-06-05 23:06:19,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:19,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35313978] [2021-06-05 23:06:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:19,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:19,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35313978] [2021-06-05 23:06:19,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35313978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:19,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945705960] [2021-06-05 23:06:19,492 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:19,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:06:19,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:19,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:19,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945705960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:19,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:19,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:19,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470308597] [2021-06-05 23:06:19,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:19,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:19,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:19,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:19,996 INFO L87 Difference]: Start difference. First operand 929 states and 2048 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:23,334 INFO L93 Difference]: Finished difference Result 1551 states and 3204 transitions. [2021-06-05 23:06:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 23:06:23,334 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:23,335 INFO L225 Difference]: With dead ends: 1551 [2021-06-05 23:06:23,335 INFO L226 Difference]: Without dead ends: 1506 [2021-06-05 23:06:23,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 3032.3ms TimeCoverageRelationStatistics Valid=1995, Invalid=14517, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 23:06:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-06-05 23:06:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 933. [2021-06-05 23:06:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.209227467811159) internal successors, (2059), 932 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2059 transitions. [2021-06-05 23:06:23,345 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2059 transitions. Word has length 43 [2021-06-05 23:06:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:23,345 INFO L482 AbstractCegarLoop]: Abstraction has 933 states and 2059 transitions. [2021-06-05 23:06:23,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2059 transitions. [2021-06-05 23:06:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:23,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:23,346 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:23,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 23:06:23,546 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash 696620353, now seen corresponding path program 145 times [2021-06-05 23:06:23,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:23,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222644621] [2021-06-05 23:06:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:23,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:23,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222644621] [2021-06-05 23:06:23,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222644621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:23,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332662444] [2021-06-05 23:06:23,860 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:23,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:24,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332662444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:24,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:24,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:24,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416389971] [2021-06-05 23:06:24,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:24,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:24,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:24,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:24,417 INFO L87 Difference]: Start difference. First operand 933 states and 2059 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:27,395 INFO L93 Difference]: Finished difference Result 1369 states and 2846 transitions. [2021-06-05 23:06:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:06:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:27,396 INFO L225 Difference]: With dead ends: 1369 [2021-06-05 23:06:27,396 INFO L226 Difference]: Without dead ends: 1342 [2021-06-05 23:06:27,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 2863.9ms TimeCoverageRelationStatistics Valid=1899, Invalid=12381, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:06:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-06-05 23:06:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 901. [2021-06-05 23:06:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.1933333333333334) internal successors, (1974), 900 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1974 transitions. [2021-06-05 23:06:27,406 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1974 transitions. Word has length 43 [2021-06-05 23:06:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:27,406 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 1974 transitions. [2021-06-05 23:06:27,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1974 transitions. [2021-06-05 23:06:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:27,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:27,407 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:27,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 23:06:27,607 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1503474267, now seen corresponding path program 146 times [2021-06-05 23:06:27,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:27,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582114281] [2021-06-05 23:06:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:27,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:27,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582114281] [2021-06-05 23:06:27,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582114281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:27,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607215396] [2021-06-05 23:06:27,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:27,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:06:27,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:27,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:28,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607215396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:28,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:28,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:28,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278901555] [2021-06-05 23:06:28,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:28,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:28,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:28,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:28,387 INFO L87 Difference]: Start difference. First operand 901 states and 1974 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:30,811 INFO L93 Difference]: Finished difference Result 1397 states and 2882 transitions. [2021-06-05 23:06:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:06:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:30,812 INFO L225 Difference]: With dead ends: 1397 [2021-06-05 23:06:30,812 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 23:06:30,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4136 ImplicationChecksByTransitivity, 2423.0ms TimeCoverageRelationStatistics Valid=1473, Invalid=11867, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 23:06:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 23:06:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 905. [2021-06-05 23:06:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1924778761061945) internal successors, (1982), 904 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1982 transitions. [2021-06-05 23:06:30,821 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1982 transitions. Word has length 43 [2021-06-05 23:06:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:30,821 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1982 transitions. [2021-06-05 23:06:30,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1982 transitions. [2021-06-05 23:06:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:30,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:30,822 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:31,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 23:06:31,023 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:31,023 INFO L82 PathProgramCache]: Analyzing trace with hash -473311767, now seen corresponding path program 147 times [2021-06-05 23:06:31,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:31,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433278618] [2021-06-05 23:06:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:31,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:31,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433278618] [2021-06-05 23:06:31,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433278618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:31,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829523225] [2021-06-05 23:06:31,309 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:31,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:06:31,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:31,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:31,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829523225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:31,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:31,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731676975] [2021-06-05 23:06:31,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:31,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:31,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:31,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:31,828 INFO L87 Difference]: Start difference. First operand 905 states and 1982 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:34,552 INFO L93 Difference]: Finished difference Result 1410 states and 2922 transitions. [2021-06-05 23:06:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:06:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:34,553 INFO L225 Difference]: With dead ends: 1410 [2021-06-05 23:06:34,553 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 23:06:34,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4542 ImplicationChecksByTransitivity, 2597.2ms TimeCoverageRelationStatistics Valid=1643, Invalid=12877, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 23:06:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 23:06:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 915. [2021-06-05 23:06:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.199124726477024) internal successors, (2010), 914 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2010 transitions. [2021-06-05 23:06:34,565 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2010 transitions. Word has length 43 [2021-06-05 23:06:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:34,565 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2010 transitions. [2021-06-05 23:06:34,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2010 transitions. [2021-06-05 23:06:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:34,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:34,566 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:34,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 23:06:34,767 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:34,767 INFO L82 PathProgramCache]: Analyzing trace with hash 622731053, now seen corresponding path program 148 times [2021-06-05 23:06:34,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:34,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039647117] [2021-06-05 23:06:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:35,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039647117] [2021-06-05 23:06:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039647117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952786702] [2021-06-05 23:06:35,051 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:35,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:06:35,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:35,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:35,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952786702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:35,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:35,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:35,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008951678] [2021-06-05 23:06:35,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:35,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:35,566 INFO L87 Difference]: Start difference. First operand 915 states and 2010 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:38,641 INFO L93 Difference]: Finished difference Result 1428 states and 2972 transitions. [2021-06-05 23:06:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:06:38,641 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:38,643 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 23:06:38,643 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 23:06:38,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4957 ImplicationChecksByTransitivity, 2731.3ms TimeCoverageRelationStatistics Valid=1824, Invalid=13926, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 23:06:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 23:06:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 925. [2021-06-05 23:06:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.205627705627706) internal successors, (2038), 924 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2038 transitions. [2021-06-05 23:06:38,654 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2038 transitions. Word has length 43 [2021-06-05 23:06:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:38,654 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2038 transitions. [2021-06-05 23:06:38,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2038 transitions. [2021-06-05 23:06:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:38,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:38,655 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:38,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 23:06:38,856 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:38,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1455155569, now seen corresponding path program 149 times [2021-06-05 23:06:38,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:38,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503404692] [2021-06-05 23:06:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:39,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503404692] [2021-06-05 23:06:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503404692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:39,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905320644] [2021-06-05 23:06:39,202 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:39,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:06:39,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:39,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:39,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:39,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905320644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:39,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:39,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:39,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801067777] [2021-06-05 23:06:39,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:39,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:39,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:39,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:39,710 INFO L87 Difference]: Start difference. First operand 925 states and 2038 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:42,839 INFO L93 Difference]: Finished difference Result 1532 states and 3164 transitions. [2021-06-05 23:06:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 23:06:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:42,840 INFO L225 Difference]: With dead ends: 1532 [2021-06-05 23:06:42,840 INFO L226 Difference]: Without dead ends: 1487 [2021-06-05 23:06:42,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 3057.1ms TimeCoverageRelationStatistics Valid=2014, Invalid=14756, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 23:06:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-05 23:06:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 929. [2021-06-05 23:06:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.2079741379310347) internal successors, (2049), 928 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2049 transitions. [2021-06-05 23:06:42,850 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2049 transitions. Word has length 43 [2021-06-05 23:06:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:42,850 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2049 transitions. [2021-06-05 23:06:42,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2049 transitions. [2021-06-05 23:06:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:42,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:42,851 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:43,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 23:06:43,051 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:43,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash 190227709, now seen corresponding path program 150 times [2021-06-05 23:06:43,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:43,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886279960] [2021-06-05 23:06:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:43,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886279960] [2021-06-05 23:06:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886279960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009544593] [2021-06-05 23:06:43,365 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:43,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:06:43,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:43,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:06:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:43,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009544593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:43,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:43,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:43,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541348919] [2021-06-05 23:06:43,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:43,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:43,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:43,928 INFO L87 Difference]: Start difference. First operand 929 states and 2049 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:47,117 INFO L93 Difference]: Finished difference Result 1359 states and 2823 transitions. [2021-06-05 23:06:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:06:47,118 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:47,119 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 23:06:47,119 INFO L226 Difference]: Without dead ends: 1332 [2021-06-05 23:06:47,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 3022.4ms TimeCoverageRelationStatistics Valid=1914, Invalid=12606, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 23:06:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-05 23:06:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 881. [2021-06-05 23:06:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1818181818181817) internal successors, (1920), 880 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1920 transitions. [2021-06-05 23:06:47,128 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1920 transitions. Word has length 43 [2021-06-05 23:06:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:47,128 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1920 transitions. [2021-06-05 23:06:47,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1920 transitions. [2021-06-05 23:06:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:47,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:47,129 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:47,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 23:06:47,329 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:47,330 INFO L82 PathProgramCache]: Analyzing trace with hash -523000667, now seen corresponding path program 151 times [2021-06-05 23:06:47,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:47,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066276899] [2021-06-05 23:06:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:47,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:47,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066276899] [2021-06-05 23:06:47,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066276899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:47,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495580771] [2021-06-05 23:06:47,606 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:47,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:48,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495580771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:48,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:48,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:48,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134827490] [2021-06-05 23:06:48,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:48,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:48,129 INFO L87 Difference]: Start difference. First operand 881 states and 1920 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:50,869 INFO L93 Difference]: Finished difference Result 1312 states and 2692 transitions. [2021-06-05 23:06:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:06:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:50,871 INFO L225 Difference]: With dead ends: 1312 [2021-06-05 23:06:50,871 INFO L226 Difference]: Without dead ends: 1268 [2021-06-05 23:06:50,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4670 ImplicationChecksByTransitivity, 2651.9ms TimeCoverageRelationStatistics Valid=1619, Invalid=13143, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 23:06:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-06-05 23:06:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 885. [2021-06-05 23:06:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.180995475113122) internal successors, (1928), 884 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1928 transitions. [2021-06-05 23:06:50,880 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1928 transitions. Word has length 43 [2021-06-05 23:06:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:50,880 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1928 transitions. [2021-06-05 23:06:50,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1928 transitions. [2021-06-05 23:06:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:50,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:50,881 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:51,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 23:06:51,081 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash 573042153, now seen corresponding path program 152 times [2021-06-05 23:06:51,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:51,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125747020] [2021-06-05 23:06:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:51,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:51,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125747020] [2021-06-05 23:06:51,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125747020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:51,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936531672] [2021-06-05 23:06:51,360 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:51,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:06:51,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:51,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:51,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:51,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936531672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:51,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:51,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764653045] [2021-06-05 23:06:51,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:51,875 INFO L87 Difference]: Start difference. First operand 885 states and 1928 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:54,914 INFO L93 Difference]: Finished difference Result 1325 states and 2728 transitions. [2021-06-05 23:06:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:06:54,914 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:54,916 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 23:06:54,916 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 23:06:54,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 2777.5ms TimeCoverageRelationStatistics Valid=1818, Invalid=14184, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 23:06:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 23:06:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 891. [2021-06-05 23:06:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.1842696629213485) internal successors, (1944), 890 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1944 transitions. [2021-06-05 23:06:54,926 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1944 transitions. Word has length 43 [2021-06-05 23:06:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:54,926 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 1944 transitions. [2021-06-05 23:06:54,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1944 transitions. [2021-06-05 23:06:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:54,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:54,928 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:55,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 23:06:55,149 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:55,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1405466669, now seen corresponding path program 153 times [2021-06-05 23:06:55,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:55,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612292042] [2021-06-05 23:06:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:55,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:55,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612292042] [2021-06-05 23:06:55,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612292042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:55,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299902443] [2021-06-05 23:06:55,475 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:55,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:06:55,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:55,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:55,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299902443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:55,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:55,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:06:55,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625611271] [2021-06-05 23:06:55,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:55,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:55,992 INFO L87 Difference]: Start difference. First operand 891 states and 1944 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:59,221 INFO L93 Difference]: Finished difference Result 1435 states and 2932 transitions. [2021-06-05 23:06:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 23:06:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:06:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:59,222 INFO L225 Difference]: With dead ends: 1435 [2021-06-05 23:06:59,223 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 23:06:59,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5395 ImplicationChecksByTransitivity, 3095.8ms TimeCoverageRelationStatistics Valid=2017, Invalid=15013, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 23:06:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 23:06:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 895. [2021-06-05 23:06:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.1868008948545863) internal successors, (1955), 894 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1955 transitions. [2021-06-05 23:06:59,232 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1955 transitions. Word has length 43 [2021-06-05 23:06:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:59,232 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 1955 transitions. [2021-06-05 23:06:59,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:06:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1955 transitions. [2021-06-05 23:06:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:06:59,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:59,233 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:59,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 23:06:59,436 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash 140538809, now seen corresponding path program 154 times [2021-06-05 23:06:59,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:59,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610366273] [2021-06-05 23:06:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:59,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:59,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610366273] [2021-06-05 23:06:59,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610366273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:59,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25171732] [2021-06-05 23:06:59,749 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:59,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:06:59,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:59,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:06:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:00,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25171732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:00,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:00,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:07:00,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082933054] [2021-06-05 23:07:00,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:00,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:00,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:00,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:00,263 INFO L87 Difference]: Start difference. First operand 895 states and 1955 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:03,267 INFO L93 Difference]: Finished difference Result 1303 states and 2684 transitions. [2021-06-05 23:07:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:07:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:07:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:03,268 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 23:07:03,268 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 23:07:03,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4606 ImplicationChecksByTransitivity, 2908.4ms TimeCoverageRelationStatistics Valid=1928, Invalid=12834, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 23:07:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 23:07:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 643. [2021-06-05 23:07:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.115264797507788) internal successors, (1358), 642 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1358 transitions. [2021-06-05 23:07:03,275 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1358 transitions. Word has length 43 [2021-06-05 23:07:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:03,275 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1358 transitions. [2021-06-05 23:07:03,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1358 transitions. [2021-06-05 23:07:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:03,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:03,276 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:03,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 23:07:03,477 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash -544326747, now seen corresponding path program 155 times [2021-06-05 23:07:03,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:03,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693050852] [2021-06-05 23:07:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:03,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:03,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693050852] [2021-06-05 23:07:03,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693050852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:03,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630998220] [2021-06-05 23:07:03,755 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:03,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:07:03,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:03,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:07:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:04,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630998220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:04,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:04,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:07:04,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142357701] [2021-06-05 23:07:04,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:04,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:04,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:04,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:04,272 INFO L87 Difference]: Start difference. First operand 643 states and 1358 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:07,329 INFO L93 Difference]: Finished difference Result 1011 states and 2000 transitions. [2021-06-05 23:07:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:07:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:07:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:07,330 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 23:07:07,330 INFO L226 Difference]: Without dead ends: 973 [2021-06-05 23:07:07,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 2792.6ms TimeCoverageRelationStatistics Valid=1787, Invalid=14469, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 23:07:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-06-05 23:07:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 647. [2021-06-05 23:07:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.1145510835913313) internal successors, (1366), 646 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1366 transitions. [2021-06-05 23:07:07,337 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1366 transitions. Word has length 43 [2021-06-05 23:07:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:07,337 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1366 transitions. [2021-06-05 23:07:07,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1366 transitions. [2021-06-05 23:07:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:07,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:07,338 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:07,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:07,538 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:07,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:07,538 INFO L82 PathProgramCache]: Analyzing trace with hash 288097769, now seen corresponding path program 156 times [2021-06-05 23:07:07,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:07,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728257545] [2021-06-05 23:07:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:07,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:07,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728257545] [2021-06-05 23:07:07,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728257545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:07,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071796198] [2021-06-05 23:07:07,851 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:07,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:07:07,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:07,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:07:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:08,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071796198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:08,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:08,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:07:08,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955749334] [2021-06-05 23:07:08,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:08,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:08,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:08,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:08,373 INFO L87 Difference]: Start difference. First operand 647 states and 1366 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:11,676 INFO L93 Difference]: Finished difference Result 1112 states and 2182 transitions. [2021-06-05 23:07:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 23:07:11,677 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:07:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:11,678 INFO L225 Difference]: With dead ends: 1112 [2021-06-05 23:07:11,678 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 23:07:11,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 3096.5ms TimeCoverageRelationStatistics Valid=2004, Invalid=15288, Unknown=0, NotChecked=0, Total=17292 [2021-06-05 23:07:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 23:07:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 649. [2021-06-05 23:07:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.115740740740741) internal successors, (1371), 648 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1371 transitions. [2021-06-05 23:07:11,684 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1371 transitions. Word has length 43 [2021-06-05 23:07:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:11,684 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1371 transitions. [2021-06-05 23:07:11,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1371 transitions. [2021-06-05 23:07:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:11,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:11,685 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:11,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 23:07:11,885 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:11,885 INFO L82 PathProgramCache]: Analyzing trace with hash -976830091, now seen corresponding path program 157 times [2021-06-05 23:07:11,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:11,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870463265] [2021-06-05 23:07:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:12,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:12,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870463265] [2021-06-05 23:07:12,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870463265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:12,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915501867] [2021-06-05 23:07:12,195 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:12,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:07:12,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:12,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915501867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:12,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:12,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:07:12,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321293353] [2021-06-05 23:07:12,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:12,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:12,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:12,733 INFO L87 Difference]: Start difference. First operand 649 states and 1371 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:15,595 INFO L93 Difference]: Finished difference Result 1006 states and 2001 transitions. [2021-06-05 23:07:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 23:07:15,595 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:07:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:15,596 INFO L225 Difference]: With dead ends: 1006 [2021-06-05 23:07:15,596 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 23:07:15,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 2907.5ms TimeCoverageRelationStatistics Valid=1906, Invalid=12856, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 23:07:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 23:07:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 637. [2021-06-05 23:07:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.1037735849056602) internal successors, (1338), 636 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1338 transitions. [2021-06-05 23:07:15,602 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1338 transitions. Word has length 43 [2021-06-05 23:07:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:15,602 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1338 transitions. [2021-06-05 23:07:15,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1338 transitions. [2021-06-05 23:07:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:15,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:15,603 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:15,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 23:07:15,804 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:15,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1442671963, now seen corresponding path program 158 times [2021-06-05 23:07:15,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:15,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579328206] [2021-06-05 23:07:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:16,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:16,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579328206] [2021-06-05 23:07:16,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579328206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:16,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756041089] [2021-06-05 23:07:16,119 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:16,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:07:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:16,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:07:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:16,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756041089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:16,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:16,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:07:16,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393361055] [2021-06-05 23:07:16,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:16,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:16,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:16,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:16,647 INFO L87 Difference]: Start difference. First operand 637 states and 1338 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:20,643 INFO L93 Difference]: Finished difference Result 1161 states and 2336 transitions. [2021-06-05 23:07:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 23:07:20,643 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:07:20,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:20,644 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 23:07:20,644 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 23:07:20,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6808 ImplicationChecksByTransitivity, 3612.6ms TimeCoverageRelationStatistics Valid=2323, Invalid=17699, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 23:07:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 23:07:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 653. [2021-06-05 23:07:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.105828220858896) internal successors, (1373), 652 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1373 transitions. [2021-06-05 23:07:20,651 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1373 transitions. Word has length 43 [2021-06-05 23:07:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:20,651 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1373 transitions. [2021-06-05 23:07:20,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1373 transitions. [2021-06-05 23:07:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:20,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:20,652 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:20,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:20,852 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1587367473, now seen corresponding path program 159 times [2021-06-05 23:07:20,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:20,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221361628] [2021-06-05 23:07:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:21,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:21,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221361628] [2021-06-05 23:07:21,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221361628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:21,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816415887] [2021-06-05 23:07:21,106 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:21,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:07:21,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:21,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:07:21,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:21,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816415887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:21,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:21,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:07:21,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392430513] [2021-06-05 23:07:21,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:21,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:21,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:21,665 INFO L87 Difference]: Start difference. First operand 653 states and 1373 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:24,354 INFO L93 Difference]: Finished difference Result 1143 states and 2277 transitions. [2021-06-05 23:07:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 23:07:24,354 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) Word has length 43 [2021-06-05 23:07:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:24,355 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 23:07:24,355 INFO L226 Difference]: Without dead ends: 1077 [2021-06-05 23:07:24,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 2737.2ms TimeCoverageRelationStatistics Valid=1808, Invalid=11998, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 23:07:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-06-05 23:07:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 444. [2021-06-05 23:07:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-06-05 23:07:24,360 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 43 [2021-06-05 23:07:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:24,360 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-06-05 23:07:24,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-06-05 23:07:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-06-05 23:07:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:07:24,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:24,361 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:24,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:24,562 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:24,562 INFO L82 PathProgramCache]: Analyzing trace with hash -976438983, now seen corresponding path program 160 times [2021-06-05 23:07:24,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:24,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465985411] [2021-06-05 23:07:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:24,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:24,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465985411] [2021-06-05 23:07:24,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465985411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:24,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687790307] [2021-06-05 23:07:24,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:24,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:07:24,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:24,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:07:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:25,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687790307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:25,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:25,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2021-06-05 23:07:25,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112615447] [2021-06-05 23:07:25,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:07:25,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:25,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:07:25,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:07:25,498 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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) [2021-06-05 23:07:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:31,400 INFO L93 Difference]: Finished difference Result 790 states and 1593 transitions. [2021-06-05 23:07:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 23:07:31,400 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:07:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:31,401 INFO L225 Difference]: With dead ends: 790 [2021-06-05 23:07:31,401 INFO L226 Difference]: Without dead ends: 764 [2021-06-05 23:07:31,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 5201.1ms TimeCoverageRelationStatistics Valid=1380, Invalid=16442, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 23:07:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-06-05 23:07:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 387. [2021-06-05 23:07:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.0725388601036268) internal successors, (800), 386 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 800 transitions. [2021-06-05 23:07:31,406 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 800 transitions. Word has length 43 [2021-06-05 23:07:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:31,406 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 800 transitions. [2021-06-05 23:07:31,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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) [2021-06-05 23:07:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 800 transitions. [2021-06-05 23:07:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:07:31,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:31,406 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:31,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 23:07:31,607 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash 126220515, now seen corresponding path program 161 times [2021-06-05 23:07:31,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:31,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773856206] [2021-06-05 23:07:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:07:31,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:31,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773856206] [2021-06-05 23:07:31,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773856206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:31,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584116486] [2021-06-05 23:07:31,677 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:31,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:07:31,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:31,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 23:07:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:07:31,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584116486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:31,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:31,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 23:07:31,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202447286] [2021-06-05 23:07:31,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:07:31,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:31,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:07:31,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:07:31,774 INFO L87 Difference]: Start difference. First operand 387 states and 800 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-06-05 23:07:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:31,941 INFO L93 Difference]: Finished difference Result 657 states and 1304 transitions. [2021-06-05 23:07:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:07:31,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 45 [2021-06-05 23:07:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:31,942 INFO L225 Difference]: With dead ends: 657 [2021-06-05 23:07:31,942 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 23:07:31,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:07:31,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 23:07:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 418. [2021-06-05 23:07:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0839328537170263) internal successors, (869), 417 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 869 transitions. [2021-06-05 23:07:31,946 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 869 transitions. Word has length 45 [2021-06-05 23:07:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:31,946 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 869 transitions. [2021-06-05 23:07:31,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-06-05 23:07:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 869 transitions. [2021-06-05 23:07:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:07:31,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:31,947 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:32,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 23:07:32,147 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:32,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1358919197, now seen corresponding path program 162 times [2021-06-05 23:07:32,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:32,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377327549] [2021-06-05 23:07:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:32,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:32,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377327549] [2021-06-05 23:07:32,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377327549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:32,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911793953] [2021-06-05 23:07:32,608 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:32,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:07:32,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:32,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:07:32,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:33,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911793953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:33,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:33,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 23:07:33,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224637714] [2021-06-05 23:07:33,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:33,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:33,305 INFO L87 Difference]: Start difference. First operand 418 states and 869 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:34,866 INFO L93 Difference]: Finished difference Result 559 states and 1149 transitions. [2021-06-05 23:07:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:07:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:07:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:34,867 INFO L225 Difference]: With dead ends: 559 [2021-06-05 23:07:34,867 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 23:07:34,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1421.5ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:07:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 23:07:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 435. [2021-06-05 23:07:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.0806451612903225) internal successors, (903), 434 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 903 transitions. [2021-06-05 23:07:34,871 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 903 transitions. Word has length 45 [2021-06-05 23:07:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:34,871 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 903 transitions. [2021-06-05 23:07:34,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 903 transitions. [2021-06-05 23:07:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:07:34,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:34,872 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:35,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 23:07:35,077 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1371110303, now seen corresponding path program 163 times [2021-06-05 23:07:35,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:35,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385710330] [2021-06-05 23:07:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:07:35,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:35,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385710330] [2021-06-05 23:07:35,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385710330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:35,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000942725] [2021-06-05 23:07:35,372 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:35,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:07:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:36,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000942725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:36,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:36,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-06-05 23:07:36,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516724495] [2021-06-05 23:07:36,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:36,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:36,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:36,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:36,029 INFO L87 Difference]: Start difference. First operand 435 states and 903 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:38,358 INFO L93 Difference]: Finished difference Result 726 states and 1438 transitions. [2021-06-05 23:07:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:07:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:07:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:38,360 INFO L225 Difference]: With dead ends: 726 [2021-06-05 23:07:38,360 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 23:07:38,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 2235.9ms TimeCoverageRelationStatistics Valid=626, Invalid=9676, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 23:07:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 23:07:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 347. [2021-06-05 23:07:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-06-05 23:07:38,365 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-06-05 23:07:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:38,365 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-06-05 23:07:38,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-06-05 23:07:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:07:38,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:38,366 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:38,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-06-05 23:07:38,589 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:38,589 INFO L82 PathProgramCache]: Analyzing trace with hash 705869159, now seen corresponding path program 164 times [2021-06-05 23:07:38,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:38,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100493992] [2021-06-05 23:07:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:39,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:39,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100493992] [2021-06-05 23:07:39,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100493992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:39,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70294510] [2021-06-05 23:07:39,047 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:39,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:07:39,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:39,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:07:39,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:39,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70294510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:39,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:39,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2021-06-05 23:07:39,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319608208] [2021-06-05 23:07:39,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 23:07:39,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 23:07:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:07:39,798 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:40,890 INFO L93 Difference]: Finished difference Result 477 states and 976 transitions. [2021-06-05 23:07:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:07:40,890 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:07:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:40,891 INFO L225 Difference]: With dead ends: 477 [2021-06-05 23:07:40,891 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 23:07:40,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1393.9ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:07:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 23:07:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 347. [2021-06-05 23:07:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-06-05 23:07:40,894 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-06-05 23:07:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:40,894 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-06-05 23:07:40,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-06-05 23:07:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:07:40,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:40,896 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:41,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 23:07:41,109 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1550510357, now seen corresponding path program 165 times [2021-06-05 23:07:41,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:41,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633415064] [2021-06-05 23:07:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:41,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633415064] [2021-06-05 23:07:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633415064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099134283] [2021-06-05 23:07:41,572 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:41,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:07:41,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:41,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:07:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:42,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099134283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:42,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:42,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 23:07:42,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696092038] [2021-06-05 23:07:42,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:42,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:42,272 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:43,656 INFO L93 Difference]: Finished difference Result 491 states and 1004 transitions. [2021-06-05 23:07:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:07:43,656 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:07:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:43,657 INFO L225 Difference]: With dead ends: 491 [2021-06-05 23:07:43,657 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 23:07:43,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1418.4ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:07:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 23:07:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 355. [2021-06-05 23:07:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.073446327683616) internal successors, (734), 354 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 734 transitions. [2021-06-05 23:07:43,660 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 734 transitions. Word has length 45 [2021-06-05 23:07:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:43,660 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 734 transitions. [2021-06-05 23:07:43,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 734 transitions. [2021-06-05 23:07:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:07:43,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:43,661 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:43,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:43,865 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:43,865 INFO L82 PathProgramCache]: Analyzing trace with hash -972740753, now seen corresponding path program 166 times [2021-06-05 23:07:43,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:43,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965012325] [2021-06-05 23:07:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:07:44,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:44,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965012325] [2021-06-05 23:07:44,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965012325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:44,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037463818] [2021-06-05 23:07:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:44,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:07:44,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:44,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:07:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037463818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:44,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:44,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-06-05 23:07:44,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317475306] [2021-06-05 23:07:44,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:44,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1658, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:44,788 INFO L87 Difference]: Start difference. First operand 355 states and 734 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:47,307 INFO L93 Difference]: Finished difference Result 605 states and 1216 transitions. [2021-06-05 23:07:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 23:07:47,308 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:07:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:47,308 INFO L225 Difference]: With dead ends: 605 [2021-06-05 23:07:47,308 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 23:07:47,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 2202.3ms TimeCoverageRelationStatistics Valid=647, Invalid=9655, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 23:07:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 23:07:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 384. [2021-06-05 23:07:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0704960835509136) internal successors, (793), 383 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 793 transitions. [2021-06-05 23:07:47,312 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 793 transitions. Word has length 45 [2021-06-05 23:07:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:47,312 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 793 transitions. [2021-06-05 23:07:47,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 793 transitions. [2021-06-05 23:07:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:07:47,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:47,313 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:47,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 23:07:47,513 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 167 times [2021-06-05 23:07:47,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:47,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039838301] [2021-06-05 23:07:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:47,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:47,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039838301] [2021-06-05 23:07:47,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039838301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:47,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855630448] [2021-06-05 23:07:47,829 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:47,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:07:47,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:47,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:07:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:48,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855630448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:48,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:48,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:07:48,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021964082] [2021-06-05 23:07:48,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:07:48,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:48,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:07:48,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:07:48,433 INFO L87 Difference]: Start difference. First operand 384 states and 793 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:51,067 INFO L93 Difference]: Finished difference Result 934 states and 1837 transitions. [2021-06-05 23:07:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:07:51,067 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:07:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:51,068 INFO L225 Difference]: With dead ends: 934 [2021-06-05 23:07:51,068 INFO L226 Difference]: Without dead ends: 855 [2021-06-05 23:07:51,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3856 ImplicationChecksByTransitivity, 2623.3ms TimeCoverageRelationStatistics Valid=1642, Invalid=11468, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 23:07:51,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-06-05 23:07:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 477. [2021-06-05 23:07:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.1512605042016806) internal successors, (1024), 476 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1024 transitions. [2021-06-05 23:07:51,074 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1024 transitions. Word has length 47 [2021-06-05 23:07:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:51,074 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1024 transitions. [2021-06-05 23:07:51,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1024 transitions. [2021-06-05 23:07:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:07:51,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:51,075 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:51,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:51,297 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1264016873, now seen corresponding path program 168 times [2021-06-05 23:07:51,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:51,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124283915] [2021-06-05 23:07:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:51,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124283915] [2021-06-05 23:07:51,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124283915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718951535] [2021-06-05 23:07:51,636 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:51,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:07:51,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:51,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 23:07:51,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:52,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718951535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:52,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:52,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:07:52,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646036838] [2021-06-05 23:07:52,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:07:52,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:52,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:07:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:07:52,331 INFO L87 Difference]: Start difference. First operand 477 states and 1024 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:55,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:55,406 INFO L93 Difference]: Finished difference Result 978 states and 1910 transitions. [2021-06-05 23:07:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 23:07:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:07:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:55,407 INFO L225 Difference]: With dead ends: 978 [2021-06-05 23:07:55,407 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 23:07:55,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4027 ImplicationChecksByTransitivity, 3062.7ms TimeCoverageRelationStatistics Valid=1709, Invalid=12571, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:07:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 23:07:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 479. [2021-06-05 23:07:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1506276150627617) internal successors, (1028), 478 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1028 transitions. [2021-06-05 23:07:55,413 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1028 transitions. Word has length 47 [2021-06-05 23:07:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:55,413 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1028 transitions. [2021-06-05 23:07:55,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1028 transitions. [2021-06-05 23:07:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:07:55,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:55,413 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:55,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:55,614 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1204905819, now seen corresponding path program 169 times [2021-06-05 23:07:55,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:55,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070141711] [2021-06-05 23:07:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:55,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:55,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070141711] [2021-06-05 23:07:55,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070141711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:55,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822644517] [2021-06-05 23:07:55,930 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:55,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:07:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:56,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822644517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:56,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:56,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:07:56,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001190270] [2021-06-05 23:07:56,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:07:56,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:56,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:07:56,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:07:56,497 INFO L87 Difference]: Start difference. First operand 479 states and 1028 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:59,376 INFO L93 Difference]: Finished difference Result 976 states and 1908 transitions. [2021-06-05 23:07:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:07:59,377 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:07:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:59,378 INFO L225 Difference]: With dead ends: 976 [2021-06-05 23:07:59,378 INFO L226 Difference]: Without dead ends: 914 [2021-06-05 23:07:59,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2782.0ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 23:07:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-06-05 23:07:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 481. [2021-06-05 23:07:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.15) internal successors, (1032), 480 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1032 transitions. [2021-06-05 23:07:59,383 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1032 transitions. Word has length 47 [2021-06-05 23:07:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:59,383 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1032 transitions. [2021-06-05 23:07:59,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1032 transitions. [2021-06-05 23:07:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:07:59,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:59,384 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:59,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:59,597 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:59,597 INFO L82 PathProgramCache]: Analyzing trace with hash -298668641, now seen corresponding path program 170 times [2021-06-05 23:07:59,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:59,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148284068] [2021-06-05 23:07:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:59,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:59,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148284068] [2021-06-05 23:07:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148284068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:59,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915426769] [2021-06-05 23:07:59,889 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:59,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:07:59,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:59,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:07:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:00,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915426769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:00,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:00,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:00,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699981299] [2021-06-05 23:08:00,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:00,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:00,454 INFO L87 Difference]: Start difference. First operand 481 states and 1032 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:03,309 INFO L93 Difference]: Finished difference Result 974 states and 1906 transitions. [2021-06-05 23:08:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:08:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:03,310 INFO L225 Difference]: With dead ends: 974 [2021-06-05 23:08:03,310 INFO L226 Difference]: Without dead ends: 918 [2021-06-05 23:08:03,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 2826.6ms TimeCoverageRelationStatistics Valid=1940, Invalid=14830, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 23:08:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-06-05 23:08:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 483. [2021-06-05 23:08:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.1493775933609958) internal successors, (1036), 482 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1036 transitions. [2021-06-05 23:08:03,316 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1036 transitions. Word has length 47 [2021-06-05 23:08:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:03,316 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1036 transitions. [2021-06-05 23:08:03,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1036 transitions. [2021-06-05 23:08:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:03,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:03,317 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:03,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 23:08:03,517 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1845015779, now seen corresponding path program 171 times [2021-06-05 23:08:03,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:03,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404300594] [2021-06-05 23:08:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:03,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404300594] [2021-06-05 23:08:03,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404300594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133150884] [2021-06-05 23:08:03,915 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:03,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:08:03,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:03,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:04,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133150884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:04,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:04,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:04,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164965931] [2021-06-05 23:08:04,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:04,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:04,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:04,503 INFO L87 Difference]: Start difference. First operand 483 states and 1036 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:07,711 INFO L93 Difference]: Finished difference Result 972 states and 1904 transitions. [2021-06-05 23:08:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 23:08:07,711 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:07,712 INFO L225 Difference]: With dead ends: 972 [2021-06-05 23:08:07,712 INFO L226 Difference]: Without dead ends: 922 [2021-06-05 23:08:07,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 3131.6ms TimeCoverageRelationStatistics Valid=2092, Invalid=15998, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 23:08:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-06-05 23:08:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 485. [2021-06-05 23:08:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.1487603305785123) internal successors, (1040), 484 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1040 transitions. [2021-06-05 23:08:07,718 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1040 transitions. Word has length 47 [2021-06-05 23:08:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:07,718 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1040 transitions. [2021-06-05 23:08:07,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1040 transitions. [2021-06-05 23:08:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:07,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:07,719 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:07,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:07,919 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1419789017, now seen corresponding path program 172 times [2021-06-05 23:08:07,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:07,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999234215] [2021-06-05 23:08:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:08,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:08,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999234215] [2021-06-05 23:08:08,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999234215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:08,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577563038] [2021-06-05 23:08:08,236 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:08,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:08:08,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:08,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:08,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:08,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577563038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:08,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:08,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:08,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530903853] [2021-06-05 23:08:08,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:08,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:08,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:08,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:08,812 INFO L87 Difference]: Start difference. First operand 485 states and 1040 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:12,242 INFO L93 Difference]: Finished difference Result 970 states and 1902 transitions. [2021-06-05 23:08:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 23:08:12,242 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:12,243 INFO L225 Difference]: With dead ends: 970 [2021-06-05 23:08:12,243 INFO L226 Difference]: Without dead ends: 926 [2021-06-05 23:08:12,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6075 ImplicationChecksByTransitivity, 3154.2ms TimeCoverageRelationStatistics Valid=2264, Invalid=17196, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 23:08:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-06-05 23:08:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 487. [2021-06-05 23:08:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1481481481481484) internal successors, (1044), 486 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1044 transitions. [2021-06-05 23:08:12,249 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1044 transitions. Word has length 47 [2021-06-05 23:08:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:12,249 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1044 transitions. [2021-06-05 23:08:12,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1044 transitions. [2021-06-05 23:08:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:12,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:12,250 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:12,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 23:08:12,450 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash -323746197, now seen corresponding path program 173 times [2021-06-05 23:08:12,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:12,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579868234] [2021-06-05 23:08:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:12,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:12,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579868234] [2021-06-05 23:08:12,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579868234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:12,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707506627] [2021-06-05 23:08:12,760 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:12,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:08:12,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:12,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:13,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707506627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:13,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:13,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:13,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831737781] [2021-06-05 23:08:13,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:13,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:13,318 INFO L87 Difference]: Start difference. First operand 487 states and 1044 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:16,820 INFO L93 Difference]: Finished difference Result 968 states and 1900 transitions. [2021-06-05 23:08:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-06-05 23:08:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:16,821 INFO L225 Difference]: With dead ends: 968 [2021-06-05 23:08:16,821 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 23:08:16,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6565 ImplicationChecksByTransitivity, 3290.6ms TimeCoverageRelationStatistics Valid=2461, Invalid=18419, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 23:08:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 23:08:16,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 489. [2021-06-05 23:08:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.1475409836065573) internal successors, (1048), 488 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1048 transitions. [2021-06-05 23:08:16,827 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1048 transitions. Word has length 47 [2021-06-05 23:08:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:16,827 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1048 transitions. [2021-06-05 23:08:16,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:16,827 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1048 transitions. [2021-06-05 23:08:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:16,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:16,828 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:17,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 23:08:17,028 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash 508678319, now seen corresponding path program 174 times [2021-06-05 23:08:17,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:17,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267418015] [2021-06-05 23:08:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:17,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:17,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267418015] [2021-06-05 23:08:17,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267418015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:17,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799505640] [2021-06-05 23:08:17,388 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:17,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:08:17,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:17,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799505640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:17,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:17,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:17,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356093745] [2021-06-05 23:08:17,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:17,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:17,955 INFO L87 Difference]: Start difference. First operand 489 states and 1048 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:22,052 INFO L93 Difference]: Finished difference Result 1037 states and 2023 transitions. [2021-06-05 23:08:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 23:08:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:22,054 INFO L225 Difference]: With dead ends: 1037 [2021-06-05 23:08:22,054 INFO L226 Difference]: Without dead ends: 992 [2021-06-05 23:08:22,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6908 ImplicationChecksByTransitivity, 3679.4ms TimeCoverageRelationStatistics Valid=2661, Invalid=19391, Unknown=0, NotChecked=0, Total=22052 [2021-06-05 23:08:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-05 23:08:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 492. [2021-06-05 23:08:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.15071283095723) internal successors, (1056), 491 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1056 transitions. [2021-06-05 23:08:22,060 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1056 transitions. Word has length 47 [2021-06-05 23:08:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:22,060 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1056 transitions. [2021-06-05 23:08:22,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1056 transitions. [2021-06-05 23:08:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:22,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:22,060 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:22,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 23:08:22,261 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:22,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:22,261 INFO L82 PathProgramCache]: Analyzing trace with hash -756249541, now seen corresponding path program 175 times [2021-06-05 23:08:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:22,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383710384] [2021-06-05 23:08:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:22,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:22,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383710384] [2021-06-05 23:08:22,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383710384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:22,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182028207] [2021-06-05 23:08:22,616 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:22,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:23,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182028207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:23,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:23,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:23,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056161130] [2021-06-05 23:08:23,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:23,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:23,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:23,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:23,176 INFO L87 Difference]: Start difference. First operand 492 states and 1056 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:26,661 INFO L93 Difference]: Finished difference Result 887 states and 1742 transitions. [2021-06-05 23:08:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 23:08:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:26,662 INFO L225 Difference]: With dead ends: 887 [2021-06-05 23:08:26,662 INFO L226 Difference]: Without dead ends: 867 [2021-06-05 23:08:26,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5722 ImplicationChecksByTransitivity, 3324.7ms TimeCoverageRelationStatistics Valid=2444, Invalid=16188, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 23:08:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-06-05 23:08:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 493. [2021-06-05 23:08:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1504065040650406) internal successors, (1058), 492 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1058 transitions. [2021-06-05 23:08:26,668 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1058 transitions. Word has length 47 [2021-06-05 23:08:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:26,668 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1058 transitions. [2021-06-05 23:08:26,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1058 transitions. [2021-06-05 23:08:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:26,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:26,668 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:26,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 23:08:26,869 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -110443807, now seen corresponding path program 176 times [2021-06-05 23:08:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:26,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312612512] [2021-06-05 23:08:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:27,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:27,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312612512] [2021-06-05 23:08:27,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312612512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:27,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602941181] [2021-06-05 23:08:27,220 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:27,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:08:27,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:27,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:27,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602941181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:27,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:27,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:27,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334231194] [2021-06-05 23:08:27,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:27,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:27,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:27,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:27,800 INFO L87 Difference]: Start difference. First operand 493 states and 1058 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:30,422 INFO L93 Difference]: Finished difference Result 958 states and 1874 transitions. [2021-06-05 23:08:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 23:08:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:30,423 INFO L225 Difference]: With dead ends: 958 [2021-06-05 23:08:30,423 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 23:08:30,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 2605.7ms TimeCoverageRelationStatistics Valid=1615, Invalid=12665, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:08:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 23:08:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 499. [2021-06-05 23:08:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.1485943775100402) internal successors, (1070), 498 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1070 transitions. [2021-06-05 23:08:30,429 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1070 transitions. Word has length 47 [2021-06-05 23:08:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:30,429 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1070 transitions. [2021-06-05 23:08:30,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1070 transitions. [2021-06-05 23:08:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:30,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:30,429 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:30,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 23:08:30,630 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1614018267, now seen corresponding path program 177 times [2021-06-05 23:08:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:30,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823431019] [2021-06-05 23:08:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:30,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:30,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823431019] [2021-06-05 23:08:30,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823431019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:30,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704640392] [2021-06-05 23:08:30,940 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:30,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:08:30,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:30,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:30,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:31,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704640392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:31,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:31,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017031130] [2021-06-05 23:08:31,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:31,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:31,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:31,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:31,522 INFO L87 Difference]: Start difference. First operand 499 states and 1070 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:34,505 INFO L93 Difference]: Finished difference Result 963 states and 1895 transitions. [2021-06-05 23:08:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 23:08:34,505 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:34,506 INFO L225 Difference]: With dead ends: 963 [2021-06-05 23:08:34,506 INFO L226 Difference]: Without dead ends: 907 [2021-06-05 23:08:34,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 2681.0ms TimeCoverageRelationStatistics Valid=1746, Invalid=13754, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 23:08:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-06-05 23:08:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 505. [2021-06-05 23:08:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1547619047619047) internal successors, (1086), 504 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1086 transitions. [2021-06-05 23:08:34,512 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1086 transitions. Word has length 47 [2021-06-05 23:08:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:34,512 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1086 transitions. [2021-06-05 23:08:34,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1086 transitions. [2021-06-05 23:08:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:34,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:34,512 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:34,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 23:08:34,713 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:34,713 INFO L82 PathProgramCache]: Analyzing trace with hash 529666153, now seen corresponding path program 178 times [2021-06-05 23:08:34,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:34,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399279336] [2021-06-05 23:08:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:35,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:35,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399279336] [2021-06-05 23:08:35,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399279336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:35,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428258475] [2021-06-05 23:08:35,018 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:35,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:08:35,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:35,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:35,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428258475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:35,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:35,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:35,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195235371] [2021-06-05 23:08:35,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:35,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:35,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:35,599 INFO L87 Difference]: Start difference. First operand 505 states and 1086 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:38,582 INFO L93 Difference]: Finished difference Result 971 states and 1921 transitions. [2021-06-05 23:08:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 23:08:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:38,583 INFO L225 Difference]: With dead ends: 971 [2021-06-05 23:08:38,583 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 23:08:38,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5184 ImplicationChecksByTransitivity, 2859.1ms TimeCoverageRelationStatistics Valid=1898, Invalid=14872, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 23:08:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 23:08:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 511. [2021-06-05 23:08:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.16078431372549) internal successors, (1102), 510 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1102 transitions. [2021-06-05 23:08:38,589 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1102 transitions. Word has length 47 [2021-06-05 23:08:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:38,589 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1102 transitions. [2021-06-05 23:08:38,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1102 transitions. [2021-06-05 23:08:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:38,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:38,595 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:38,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:38,797 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1559828653, now seen corresponding path program 179 times [2021-06-05 23:08:38,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:38,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158008118] [2021-06-05 23:08:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:39,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:39,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158008118] [2021-06-05 23:08:39,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158008118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:39,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340771747] [2021-06-05 23:08:39,105 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:39,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:08:39,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:39,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:39,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:39,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340771747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:39,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:39,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461705529] [2021-06-05 23:08:39,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:39,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:39,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:39,681 INFO L87 Difference]: Start difference. First operand 511 states and 1102 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:42,956 INFO L93 Difference]: Finished difference Result 979 states and 1947 transitions. [2021-06-05 23:08:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 23:08:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:42,958 INFO L225 Difference]: With dead ends: 979 [2021-06-05 23:08:42,958 INFO L226 Difference]: Without dead ends: 935 [2021-06-05 23:08:42,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5631 ImplicationChecksByTransitivity, 2979.5ms TimeCoverageRelationStatistics Valid=2070, Invalid=16020, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 23:08:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-05 23:08:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 517. [2021-06-05 23:08:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.1666666666666665) internal successors, (1118), 516 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1118 transitions. [2021-06-05 23:08:42,963 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1118 transitions. Word has length 47 [2021-06-05 23:08:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:42,963 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1118 transitions. [2021-06-05 23:08:42,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1118 transitions. [2021-06-05 23:08:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:42,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:42,964 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:43,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:43,164 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1639095823, now seen corresponding path program 180 times [2021-06-05 23:08:43,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:43,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441431382] [2021-06-05 23:08:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:43,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:43,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441431382] [2021-06-05 23:08:43,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441431382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:43,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083083778] [2021-06-05 23:08:43,474 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:43,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:08:43,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:43,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:44,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083083778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:44,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:44,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:44,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589386807] [2021-06-05 23:08:44,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:44,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:44,053 INFO L87 Difference]: Start difference. First operand 517 states and 1118 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:47,649 INFO L93 Difference]: Finished difference Result 987 states and 1973 transitions. [2021-06-05 23:08:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 23:08:47,650 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:47,651 INFO L225 Difference]: With dead ends: 987 [2021-06-05 23:08:47,651 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 23:08:47,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6092 ImplicationChecksByTransitivity, 3150.0ms TimeCoverageRelationStatistics Valid=2267, Invalid=17193, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 23:08:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 23:08:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 523. [2021-06-05 23:08:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1724137931034484) internal successors, (1134), 522 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1134 transitions. [2021-06-05 23:08:47,656 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1134 transitions. Word has length 47 [2021-06-05 23:08:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:47,656 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1134 transitions. [2021-06-05 23:08:47,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1134 transitions. [2021-06-05 23:08:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:47,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:47,657 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:47,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:47,857 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -806671307, now seen corresponding path program 181 times [2021-06-05 23:08:47,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:47,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423374790] [2021-06-05 23:08:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:48,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423374790] [2021-06-05 23:08:48,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423374790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147776665] [2021-06-05 23:08:48,199 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:48,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:48,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147776665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:48,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:48,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:48,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199502304] [2021-06-05 23:08:48,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:48,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:48,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:48,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:48,775 INFO L87 Difference]: Start difference. First operand 523 states and 1134 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:52,509 INFO L93 Difference]: Finished difference Result 1095 states and 2169 transitions. [2021-06-05 23:08:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 23:08:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:52,510 INFO L225 Difference]: With dead ends: 1095 [2021-06-05 23:08:52,510 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 23:08:52,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6417 ImplicationChecksByTransitivity, 3481.7ms TimeCoverageRelationStatistics Valid=2470, Invalid=18122, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 23:08:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 23:08:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 527. [2021-06-05 23:08:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.17680608365019) internal successors, (1145), 526 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1145 transitions. [2021-06-05 23:08:52,518 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1145 transitions. Word has length 47 [2021-06-05 23:08:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:52,518 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1145 transitions. [2021-06-05 23:08:52,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1145 transitions. [2021-06-05 23:08:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:52,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:52,518 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:52,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:52,719 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2071599167, now seen corresponding path program 182 times [2021-06-05 23:08:52,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:52,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007767348] [2021-06-05 23:08:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:53,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:53,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007767348] [2021-06-05 23:08:53,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007767348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:53,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833236736] [2021-06-05 23:08:53,068 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:53,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:08:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:53,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:53,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833236736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:53,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:53,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:53,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363290690] [2021-06-05 23:08:53,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:53,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:53,641 INFO L87 Difference]: Start difference. First operand 527 states and 1145 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:57,376 INFO L93 Difference]: Finished difference Result 945 states and 1898 transitions. [2021-06-05 23:08:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:08:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:08:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:57,377 INFO L225 Difference]: With dead ends: 945 [2021-06-05 23:08:57,377 INFO L226 Difference]: Without dead ends: 925 [2021-06-05 23:08:57,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5370 ImplicationChecksByTransitivity, 3212.1ms TimeCoverageRelationStatistics Valid=2321, Invalid=15235, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 23:08:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-06-05 23:08:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 505. [2021-06-05 23:08:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1626984126984126) internal successors, (1090), 504 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1090 transitions. [2021-06-05 23:08:57,382 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1090 transitions. Word has length 47 [2021-06-05 23:08:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:57,383 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1090 transitions. [2021-06-05 23:08:57,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1090 transitions. [2021-06-05 23:08:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:08:57,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:57,383 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:57,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:57,584 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1368922593, now seen corresponding path program 183 times [2021-06-05 23:08:57,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:57,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510031906] [2021-06-05 23:08:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:57,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:57,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510031906] [2021-06-05 23:08:57,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510031906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:57,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036508031] [2021-06-05 23:08:57,875 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:57,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:08:57,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:57,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:08:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:58,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036508031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:58,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:58,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:08:58,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688389851] [2021-06-05 23:08:58,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:08:58,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:58,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:08:58,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:08:58,458 INFO L87 Difference]: Start difference. First operand 505 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:01,327 INFO L93 Difference]: Finished difference Result 947 states and 1867 transitions. [2021-06-05 23:09:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 23:09:01,327 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:01,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:01,328 INFO L225 Difference]: With dead ends: 947 [2021-06-05 23:09:01,328 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 23:09:01,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4884 ImplicationChecksByTransitivity, 2712.0ms TimeCoverageRelationStatistics Valid=1731, Invalid=14019, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 23:09:01,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 23:09:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 509. [2021-06-05 23:09:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.161417322834646) internal successors, (1098), 508 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1098 transitions. [2021-06-05 23:09:01,334 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1098 transitions. Word has length 47 [2021-06-05 23:09:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:01,334 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1098 transitions. [2021-06-05 23:09:01,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1098 transitions. [2021-06-05 23:09:01,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:01,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:01,335 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:01,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 23:09:01,536 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:01,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:01,536 INFO L82 PathProgramCache]: Analyzing trace with hash -782360283, now seen corresponding path program 184 times [2021-06-05 23:09:01,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:01,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716328222] [2021-06-05 23:09:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:01,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:01,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716328222] [2021-06-05 23:09:01,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716328222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:01,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587686646] [2021-06-05 23:09:01,846 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:01,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:09:01,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:01,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:02,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587686646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:02,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:02,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:02,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121530817] [2021-06-05 23:09:02,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:02,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:02,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:02,446 INFO L87 Difference]: Start difference. First operand 509 states and 1098 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:05,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:05,466 INFO L93 Difference]: Finished difference Result 954 states and 1892 transitions. [2021-06-05 23:09:05,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 23:09:05,466 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:05,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:05,467 INFO L225 Difference]: With dead ends: 954 [2021-06-05 23:09:05,467 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 23:09:05,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5322 ImplicationChecksByTransitivity, 2915.5ms TimeCoverageRelationStatistics Valid=1901, Invalid=15129, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 23:09:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 23:09:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 515. [2021-06-05 23:09:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.167315175097276) internal successors, (1114), 514 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1114 transitions. [2021-06-05 23:09:05,473 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1114 transitions. Word has length 47 [2021-06-05 23:09:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:05,473 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1114 transitions. [2021-06-05 23:09:05,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1114 transitions. [2021-06-05 23:09:05,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:05,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:05,474 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:05,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 23:09:05,674 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash 247802217, now seen corresponding path program 185 times [2021-06-05 23:09:05,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:05,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468050823] [2021-06-05 23:09:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:06,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:06,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468050823] [2021-06-05 23:09:06,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468050823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:06,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389511094] [2021-06-05 23:09:06,007 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:06,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:09:06,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:06,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:06,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389511094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:06,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:06,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:06,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164175574] [2021-06-05 23:09:06,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:06,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:06,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:06,630 INFO L87 Difference]: Start difference. First operand 515 states and 1114 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:09,897 INFO L93 Difference]: Finished difference Result 964 states and 1922 transitions. [2021-06-05 23:09:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 23:09:09,897 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:09,898 INFO L225 Difference]: With dead ends: 964 [2021-06-05 23:09:09,898 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 23:09:09,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5770 ImplicationChecksByTransitivity, 3077.8ms TimeCoverageRelationStatistics Valid=2082, Invalid=16278, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 23:09:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 23:09:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 521. [2021-06-05 23:09:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.173076923076923) internal successors, (1130), 520 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1130 transitions. [2021-06-05 23:09:09,904 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1130 transitions. Word has length 47 [2021-06-05 23:09:09,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:09,904 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1130 transitions. [2021-06-05 23:09:09,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1130 transitions. [2021-06-05 23:09:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:09,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:09,904 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:10,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:10,105 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1343845037, now seen corresponding path program 186 times [2021-06-05 23:09:10,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:10,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945514946] [2021-06-05 23:09:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:10,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:10,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945514946] [2021-06-05 23:09:10,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945514946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:10,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633785132] [2021-06-05 23:09:10,414 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:10,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:09:10,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:10,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:10,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:10,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633785132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:10,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:10,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:10,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589417243] [2021-06-05 23:09:10,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:10,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:10,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:10,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:10,992 INFO L87 Difference]: Start difference. First operand 521 states and 1130 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:14,360 INFO L93 Difference]: Finished difference Result 974 states and 1952 transitions. [2021-06-05 23:09:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 23:09:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:14,361 INFO L225 Difference]: With dead ends: 974 [2021-06-05 23:09:14,361 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 23:09:14,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6232 ImplicationChecksByTransitivity, 3164.7ms TimeCoverageRelationStatistics Valid=2288, Invalid=17452, Unknown=0, NotChecked=0, Total=19740 [2021-06-05 23:09:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 23:09:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 527. [2021-06-05 23:09:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.178707224334601) internal successors, (1146), 526 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1146 transitions. [2021-06-05 23:09:14,366 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1146 transitions. Word has length 47 [2021-06-05 23:09:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:14,366 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1146 transitions. [2021-06-05 23:09:14,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1146 transitions. [2021-06-05 23:09:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:14,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:14,367 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:14,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:14,589 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:14,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2118697743, now seen corresponding path program 187 times [2021-06-05 23:09:14,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:14,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33438574] [2021-06-05 23:09:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:14,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:14,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33438574] [2021-06-05 23:09:14,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33438574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:14,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556337233] [2021-06-05 23:09:14,939 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:14,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:14,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:15,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556337233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:15,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:15,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:15,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633062600] [2021-06-05 23:09:15,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:15,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:15,509 INFO L87 Difference]: Start difference. First operand 527 states and 1146 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:19,330 INFO L93 Difference]: Finished difference Result 1084 states and 2152 transitions. [2021-06-05 23:09:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 23:09:19,330 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:19,331 INFO L225 Difference]: With dead ends: 1084 [2021-06-05 23:09:19,331 INFO L226 Difference]: Without dead ends: 1039 [2021-06-05 23:09:19,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6553 ImplicationChecksByTransitivity, 3515.6ms TimeCoverageRelationStatistics Valid=2500, Invalid=18380, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 23:09:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-05 23:09:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 531. [2021-06-05 23:09:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.1830188679245284) internal successors, (1157), 530 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1157 transitions. [2021-06-05 23:09:19,337 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1157 transitions. Word has length 47 [2021-06-05 23:09:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:19,337 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1157 transitions. [2021-06-05 23:09:19,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1157 transitions. [2021-06-05 23:09:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:19,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:19,338 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:19,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 23:09:19,538 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:19,539 INFO L82 PathProgramCache]: Analyzing trace with hash 911341693, now seen corresponding path program 188 times [2021-06-05 23:09:19,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:19,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724354308] [2021-06-05 23:09:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:19,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:19,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724354308] [2021-06-05 23:09:19,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724354308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:19,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845720619] [2021-06-05 23:09:19,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:19,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:09:19,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:19,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:19,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:20,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845720619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:20,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:20,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:20,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138096636] [2021-06-05 23:09:20,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:20,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:20,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:20,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:20,474 INFO L87 Difference]: Start difference. First operand 531 states and 1157 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:23,962 INFO L93 Difference]: Finished difference Result 937 states and 1886 transitions. [2021-06-05 23:09:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:09:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:23,963 INFO L225 Difference]: With dead ends: 937 [2021-06-05 23:09:23,963 INFO L226 Difference]: Without dead ends: 917 [2021-06-05 23:09:23,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5494 ImplicationChecksByTransitivity, 3276.3ms TimeCoverageRelationStatistics Valid=2362, Invalid=15460, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 23:09:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-06-05 23:09:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 503. [2021-06-05 23:09:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.1553784860557768) internal successors, (1082), 502 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1082 transitions. [2021-06-05 23:09:23,968 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1082 transitions. Word has length 47 [2021-06-05 23:09:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:23,968 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1082 transitions. [2021-06-05 23:09:23,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1082 transitions. [2021-06-05 23:09:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:23,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:23,969 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:24,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:24,169 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1288752927, now seen corresponding path program 189 times [2021-06-05 23:09:24,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:24,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616223857] [2021-06-05 23:09:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:24,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:24,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616223857] [2021-06-05 23:09:24,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616223857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:24,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453015208] [2021-06-05 23:09:24,477 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:24,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:09:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:24,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:24,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:25,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453015208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:25,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:25,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:25,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217148168] [2021-06-05 23:09:25,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:25,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:25,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:25,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:25,059 INFO L87 Difference]: Start difference. First operand 503 states and 1082 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:28,129 INFO L93 Difference]: Finished difference Result 924 states and 1824 transitions. [2021-06-05 23:09:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 23:09:28,129 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:28,130 INFO L225 Difference]: With dead ends: 924 [2021-06-05 23:09:28,130 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 23:09:28,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 2923.1ms TimeCoverageRelationStatistics Valid=1879, Invalid=15413, Unknown=0, NotChecked=0, Total=17292 [2021-06-05 23:09:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 23:09:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 507. [2021-06-05 23:09:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.1541501976284585) internal successors, (1090), 506 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1090 transitions. [2021-06-05 23:09:28,136 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1090 transitions. Word has length 47 [2021-06-05 23:09:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:28,136 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1090 transitions. [2021-06-05 23:09:28,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1090 transitions. [2021-06-05 23:09:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:28,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:28,136 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:28,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 23:09:28,338 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:28,339 INFO L82 PathProgramCache]: Analyzing trace with hash -258590427, now seen corresponding path program 190 times [2021-06-05 23:09:28,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:28,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055414027] [2021-06-05 23:09:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:28,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:28,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055414027] [2021-06-05 23:09:28,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055414027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:28,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301749712] [2021-06-05 23:09:28,716 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:28,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:09:28,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:28,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:28,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:29,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301749712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:29,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:29,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:29,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248870639] [2021-06-05 23:09:29,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:29,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:29,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:29,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:29,318 INFO L87 Difference]: Start difference. First operand 507 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:32,520 INFO L93 Difference]: Finished difference Result 933 states and 1853 transitions. [2021-06-05 23:09:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 23:09:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:32,521 INFO L225 Difference]: With dead ends: 933 [2021-06-05 23:09:32,521 INFO L226 Difference]: Without dead ends: 889 [2021-06-05 23:09:32,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 3147.2ms TimeCoverageRelationStatistics Valid=2078, Invalid=16554, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 23:09:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-05 23:09:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 513. [2021-06-05 23:09:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.16015625) internal successors, (1106), 512 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1106 transitions. [2021-06-05 23:09:32,527 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1106 transitions. Word has length 47 [2021-06-05 23:09:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:32,527 INFO L482 AbstractCegarLoop]: Abstraction has 513 states and 1106 transitions. [2021-06-05 23:09:32,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1106 transitions. [2021-06-05 23:09:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:32,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:32,528 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:32,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:32,730 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:32,730 INFO L82 PathProgramCache]: Analyzing trace with hash 837452393, now seen corresponding path program 191 times [2021-06-05 23:09:32,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:32,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672651948] [2021-06-05 23:09:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:33,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:33,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672651948] [2021-06-05 23:09:33,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672651948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:33,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900331917] [2021-06-05 23:09:33,041 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:33,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:09:33,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:33,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:33,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900331917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:33,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:33,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:33,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299555683] [2021-06-05 23:09:33,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:33,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:33,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:33,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:33,622 INFO L87 Difference]: Start difference. First operand 513 states and 1106 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:37,273 INFO L93 Difference]: Finished difference Result 945 states and 1887 transitions. [2021-06-05 23:09:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 23:09:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:37,275 INFO L225 Difference]: With dead ends: 945 [2021-06-05 23:09:37,275 INFO L226 Difference]: Without dead ends: 907 [2021-06-05 23:09:37,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6385 ImplicationChecksByTransitivity, 3223.8ms TimeCoverageRelationStatistics Valid=2293, Invalid=17729, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 23:09:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-06-05 23:09:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 519. [2021-06-05 23:09:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.166023166023166) internal successors, (1122), 518 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1122 transitions. [2021-06-05 23:09:37,281 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1122 transitions. Word has length 47 [2021-06-05 23:09:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:37,281 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1122 transitions. [2021-06-05 23:09:37,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1122 transitions. [2021-06-05 23:09:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:37,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:37,281 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:37,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:37,482 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1669876909, now seen corresponding path program 192 times [2021-06-05 23:09:37,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:37,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823808713] [2021-06-05 23:09:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:37,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823808713] [2021-06-05 23:09:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823808713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023441270] [2021-06-05 23:09:37,837 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:37,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:09:37,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:37,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:38,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023441270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:38,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:38,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:38,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609009451] [2021-06-05 23:09:38,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:38,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:38,426 INFO L87 Difference]: Start difference. First operand 519 states and 1122 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:42,275 INFO L93 Difference]: Finished difference Result 1057 states and 2091 transitions. [2021-06-05 23:09:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 23:09:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:42,276 INFO L225 Difference]: With dead ends: 1057 [2021-06-05 23:09:42,276 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 23:09:42,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 3559.1ms TimeCoverageRelationStatistics Valid=2514, Invalid=18656, Unknown=0, NotChecked=0, Total=21170 [2021-06-05 23:09:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 23:09:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 523. [2021-06-05 23:09:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1704980842911876) internal successors, (1133), 522 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1133 transitions. [2021-06-05 23:09:42,282 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1133 transitions. Word has length 47 [2021-06-05 23:09:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:42,282 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1133 transitions. [2021-06-05 23:09:42,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1133 transitions. [2021-06-05 23:09:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:42,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:42,283 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:42,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 23:09:42,483 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash 404949049, now seen corresponding path program 193 times [2021-06-05 23:09:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:42,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114727] [2021-06-05 23:09:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:42,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:42,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114727] [2021-06-05 23:09:42,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:42,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835275977] [2021-06-05 23:09:42,825 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:42,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:43,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835275977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:43,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:43,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:43,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146681025] [2021-06-05 23:09:43,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:43,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1875, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:43,407 INFO L87 Difference]: Start difference. First operand 523 states and 1133 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:46,876 INFO L93 Difference]: Finished difference Result 913 states and 1830 transitions. [2021-06-05 23:09:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:09:46,877 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:46,877 INFO L225 Difference]: With dead ends: 913 [2021-06-05 23:09:46,877 INFO L226 Difference]: Without dead ends: 893 [2021-06-05 23:09:46,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 3317.7ms TimeCoverageRelationStatistics Valid=2386, Invalid=15704, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 23:09:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-06-05 23:09:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 501. [2021-06-05 23:09:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.148) internal successors, (1074), 500 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1074 transitions. [2021-06-05 23:09:46,883 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1074 transitions. Word has length 47 [2021-06-05 23:09:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:46,883 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1074 transitions. [2021-06-05 23:09:46,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1074 transitions. [2021-06-05 23:09:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:46,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:46,883 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:47,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 23:09:47,084 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:47,084 INFO L82 PathProgramCache]: Analyzing trace with hash -308279327, now seen corresponding path program 194 times [2021-06-05 23:09:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:47,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610711165] [2021-06-05 23:09:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:47,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:47,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610711165] [2021-06-05 23:09:47,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610711165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:47,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021101715] [2021-06-05 23:09:47,390 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:47,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:09:47,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:47,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:47,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:47,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021101715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:47,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:47,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:47,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259468604] [2021-06-05 23:09:47,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:47,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:47,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:47,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:47,970 INFO L87 Difference]: Start difference. First operand 501 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:51,371 INFO L93 Difference]: Finished difference Result 901 states and 1781 transitions. [2021-06-05 23:09:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 23:09:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:51,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:51,372 INFO L225 Difference]: With dead ends: 901 [2021-06-05 23:09:51,372 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 23:09:51,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6064 ImplicationChecksByTransitivity, 3091.7ms TimeCoverageRelationStatistics Valid=2049, Invalid=16857, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 23:09:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 23:09:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 505. [2021-06-05 23:09:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1468253968253967) internal successors, (1082), 504 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1082 transitions. [2021-06-05 23:09:51,378 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1082 transitions. Word has length 47 [2021-06-05 23:09:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:51,378 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1082 transitions. [2021-06-05 23:09:51,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1082 transitions. [2021-06-05 23:09:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:51,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:51,378 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:51,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 23:09:51,579 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:51,579 INFO L82 PathProgramCache]: Analyzing trace with hash 787763493, now seen corresponding path program 195 times [2021-06-05 23:09:51,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:51,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343607093] [2021-06-05 23:09:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:51,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:51,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343607093] [2021-06-05 23:09:51,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343607093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:51,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024493118] [2021-06-05 23:09:51,888 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:51,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:09:51,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:51,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:09:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:52,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024493118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:52,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:52,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-06-05 23:09:52,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132309024] [2021-06-05 23:09:52,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:09:52,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:09:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:09:52,509 INFO L87 Difference]: Start difference. First operand 505 states and 1082 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:55,878 INFO L93 Difference]: Finished difference Result 907 states and 1805 transitions. [2021-06-05 23:09:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 23:09:55,879 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:09:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:55,879 INFO L225 Difference]: With dead ends: 907 [2021-06-05 23:09:55,879 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 23:09:55,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6572 ImplicationChecksByTransitivity, 3238.8ms TimeCoverageRelationStatistics Valid=2282, Invalid=18024, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 23:09:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 23:09:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 510. [2021-06-05 23:09:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.1532416502946954) internal successors, (1096), 509 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1096 transitions. [2021-06-05 23:09:55,885 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1096 transitions. Word has length 47 [2021-06-05 23:09:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:55,885 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1096 transitions. [2021-06-05 23:09:55,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1096 transitions. [2021-06-05 23:09:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:09:55,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:55,886 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:56,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 23:09:56,086 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:56,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1620188009, now seen corresponding path program 196 times [2021-06-05 23:09:56,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:56,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214880890] [2021-06-05 23:09:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:56,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:56,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214880890] [2021-06-05 23:09:56,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214880890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:56,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272909758] [2021-06-05 23:09:56,437 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:56,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:09:56,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:56,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:09:56,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:57,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272909758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:57,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:57,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:09:57,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772330998] [2021-06-05 23:09:57,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:09:57,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:57,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:09:57,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:09:57,020 INFO L87 Difference]: Start difference. First operand 510 states and 1096 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:00,884 INFO L93 Difference]: Finished difference Result 1031 states and 2030 transitions. [2021-06-05 23:10:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 23:10:00,884 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:10:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:00,885 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 23:10:00,885 INFO L226 Difference]: Without dead ends: 977 [2021-06-05 23:10:00,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6988 ImplicationChecksByTransitivity, 3644.0ms TimeCoverageRelationStatistics Valid=2535, Invalid=19221, Unknown=0, NotChecked=0, Total=21756 [2021-06-05 23:10:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-06-05 23:10:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 515. [2021-06-05 23:10:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.157587548638132) internal successors, (1109), 514 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1109 transitions. [2021-06-05 23:10:00,891 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1109 transitions. Word has length 47 [2021-06-05 23:10:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:00,891 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1109 transitions. [2021-06-05 23:10:00,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1109 transitions. [2021-06-05 23:10:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:10:00,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:00,891 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:01,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 23:10:01,092 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:01,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:01,092 INFO L82 PathProgramCache]: Analyzing trace with hash 355260149, now seen corresponding path program 197 times [2021-06-05 23:10:01,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:01,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109239540] [2021-06-05 23:10:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:01,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:01,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109239540] [2021-06-05 23:10:01,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109239540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:01,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322719766] [2021-06-05 23:10:01,433 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:01,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:10:01,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:01,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:10:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:02,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322719766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:02,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:02,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:10:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127984871] [2021-06-05 23:10:02,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:10:02,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:10:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:10:02,017 INFO L87 Difference]: Start difference. First operand 515 states and 1109 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:05,777 INFO L93 Difference]: Finished difference Result 881 states and 1758 transitions. [2021-06-05 23:10:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:10:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:10:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:05,778 INFO L225 Difference]: With dead ends: 881 [2021-06-05 23:10:05,778 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 23:10:05,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5783 ImplicationChecksByTransitivity, 3389.4ms TimeCoverageRelationStatistics Valid=2393, Invalid=15967, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 23:10:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 23:10:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 499. [2021-06-05 23:10:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.140562248995984) internal successors, (1066), 498 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1066 transitions. [2021-06-05 23:10:05,784 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1066 transitions. Word has length 47 [2021-06-05 23:10:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:05,784 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1066 transitions. [2021-06-05 23:10:05,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1066 transitions. [2021-06-05 23:10:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:10:05,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:05,785 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:05,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 23:10:05,985 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -329605407, now seen corresponding path program 198 times [2021-06-05 23:10:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363296612] [2021-06-05 23:10:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:06,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:06,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363296612] [2021-06-05 23:10:06,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363296612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:06,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641897042] [2021-06-05 23:10:06,304 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:06,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:10:06,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:06,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:10:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:06,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641897042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:06,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:06,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:10:06,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554349410] [2021-06-05 23:10:06,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:10:06,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:06,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:10:06,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:10:06,890 INFO L87 Difference]: Start difference. First operand 499 states and 1066 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:10,599 INFO L93 Difference]: Finished difference Result 858 states and 1689 transitions. [2021-06-05 23:10:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 23:10:10,599 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:10:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:10,600 INFO L225 Difference]: With dead ends: 858 [2021-06-05 23:10:10,600 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 23:10:10,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 3319.8ms TimeCoverageRelationStatistics Valid=2246, Invalid=18346, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 23:10:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 23:10:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 503. [2021-06-05 23:10:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.139442231075697) internal successors, (1074), 502 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1074 transitions. [2021-06-05 23:10:10,606 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1074 transitions. Word has length 47 [2021-06-05 23:10:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:10,606 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1074 transitions. [2021-06-05 23:10:10,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1074 transitions. [2021-06-05 23:10:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:10:10,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:10,606 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:10,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:10,807 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:10,807 INFO L82 PathProgramCache]: Analyzing trace with hash 502819109, now seen corresponding path program 199 times [2021-06-05 23:10:10,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:10,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273139924] [2021-06-05 23:10:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:11,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:11,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273139924] [2021-06-05 23:10:11,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273139924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:11,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7896256] [2021-06-05 23:10:11,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:11,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:10:11,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:11,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7896256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:11,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:11,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:10:11,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616501374] [2021-06-05 23:10:11,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:10:11,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:10:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:10:11,752 INFO L87 Difference]: Start difference. First operand 503 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:15,776 INFO L93 Difference]: Finished difference Result 963 states and 1875 transitions. [2021-06-05 23:10:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 23:10:15,776 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:10:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:15,777 INFO L225 Difference]: With dead ends: 963 [2021-06-05 23:10:15,777 INFO L226 Difference]: Without dead ends: 918 [2021-06-05 23:10:15,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7057 ImplicationChecksByTransitivity, 3624.0ms TimeCoverageRelationStatistics Valid=2494, Invalid=19262, Unknown=0, NotChecked=0, Total=21756 [2021-06-05 23:10:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-06-05 23:10:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 505. [2021-06-05 23:10:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.140873015873016) internal successors, (1079), 504 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1079 transitions. [2021-06-05 23:10:15,783 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1079 transitions. Word has length 47 [2021-06-05 23:10:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:15,783 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1079 transitions. [2021-06-05 23:10:15,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1079 transitions. [2021-06-05 23:10:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:10:15,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:15,783 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:15,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 23:10:15,984 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:15,984 INFO L82 PathProgramCache]: Analyzing trace with hash -762108751, now seen corresponding path program 200 times [2021-06-05 23:10:15,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:15,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578143000] [2021-06-05 23:10:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:16,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:16,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578143000] [2021-06-05 23:10:16,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578143000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:16,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376998646] [2021-06-05 23:10:16,333 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:16,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:16,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:10:16,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:16,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376998646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:16,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:16,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:10:16,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703321689] [2021-06-05 23:10:16,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:10:16,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:16,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:10:16,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:10:16,930 INFO L87 Difference]: Start difference. First operand 505 states and 1079 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:20,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:20,630 INFO L93 Difference]: Finished difference Result 845 states and 1674 transitions. [2021-06-05 23:10:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:10:20,631 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:10:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:20,631 INFO L225 Difference]: With dead ends: 845 [2021-06-05 23:10:20,631 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 23:10:20,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5942 ImplicationChecksByTransitivity, 3472.9ms TimeCoverageRelationStatistics Valid=2384, Invalid=16248, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 23:10:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 23:10:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 493. [2021-06-05 23:10:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1260162601626016) internal successors, (1046), 492 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1046 transitions. [2021-06-05 23:10:20,637 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1046 transitions. Word has length 47 [2021-06-05 23:10:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:20,637 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1046 transitions. [2021-06-05 23:10:20,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1046 transitions. [2021-06-05 23:10:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:10:20,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:20,637 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:20,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:20,838 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:20,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:20,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1227950623, now seen corresponding path program 201 times [2021-06-05 23:10:20,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:20,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440023989] [2021-06-05 23:10:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:21,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:21,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440023989] [2021-06-05 23:10:21,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440023989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:21,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515102968] [2021-06-05 23:10:21,125 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:21,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:10:21,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:21,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:10:21,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:21,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515102968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:21,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:21,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:10:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650485553] [2021-06-05 23:10:21,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:10:21,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:21,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:10:21,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:10:21,717 INFO L87 Difference]: Start difference. First operand 493 states and 1046 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:26,089 INFO L93 Difference]: Finished difference Result 986 states and 1986 transitions. [2021-06-05 23:10:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 23:10:26,089 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:10:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:26,090 INFO L225 Difference]: With dead ends: 986 [2021-06-05 23:10:26,090 INFO L226 Difference]: Without dead ends: 938 [2021-06-05 23:10:26,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8617 ImplicationChecksByTransitivity, 4147.2ms TimeCoverageRelationStatistics Valid=2834, Invalid=22606, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 23:10:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-05 23:10:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 509. [2021-06-05 23:10:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.127952755905512) internal successors, (1081), 508 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1081 transitions. [2021-06-05 23:10:26,095 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1081 transitions. Word has length 47 [2021-06-05 23:10:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:26,095 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1081 transitions. [2021-06-05 23:10:26,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1081 transitions. [2021-06-05 23:10:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:10:26,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:26,096 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:26,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:26,296 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1802088813, now seen corresponding path program 202 times [2021-06-05 23:10:26,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:26,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942355786] [2021-06-05 23:10:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:26,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:26,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942355786] [2021-06-05 23:10:26,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942355786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:26,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4311486] [2021-06-05 23:10:26,581 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:26,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:26,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:26,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:10:26,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:27,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4311486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:27,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:27,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-06-05 23:10:27,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849094291] [2021-06-05 23:10:27,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:10:27,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:27,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:10:27,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:10:27,154 INFO L87 Difference]: Start difference. First operand 509 states and 1081 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:31,196 INFO L93 Difference]: Finished difference Result 1017 states and 2034 transitions. [2021-06-05 23:10:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 23:10:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:10:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:31,197 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 23:10:31,197 INFO L226 Difference]: Without dead ends: 969 [2021-06-05 23:10:31,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6758 ImplicationChecksByTransitivity, 3482.8ms TimeCoverageRelationStatistics Valid=2550, Invalid=18330, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 23:10:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-06-05 23:10:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 506. [2021-06-05 23:10:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.120792079207921) internal successors, (1071), 505 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1071 transitions. [2021-06-05 23:10:31,203 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1071 transitions. Word has length 47 [2021-06-05 23:10:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:31,203 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1071 transitions. [2021-06-05 23:10:31,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1071 transitions. [2021-06-05 23:10:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:10:31,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:31,204 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:31,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:31,404 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:31,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:31,404 INFO L82 PathProgramCache]: Analyzing trace with hash 635930283, now seen corresponding path program 203 times [2021-06-05 23:10:31,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:31,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763786049] [2021-06-05 23:10:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:31,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763786049] [2021-06-05 23:10:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763786049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359316577] [2021-06-05 23:10:31,795 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:31,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 23:10:31,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:31,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:10:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:32,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359316577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:32,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:32,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2021-06-05 23:10:32,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868683714] [2021-06-05 23:10:32,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:10:32,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:32,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:10:32,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:10:32,459 INFO L87 Difference]: Start difference. First operand 506 states and 1071 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:39,686 INFO L93 Difference]: Finished difference Result 1005 states and 2058 transitions. [2021-06-05 23:10:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-06-05 23:10:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:10:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:39,687 INFO L225 Difference]: With dead ends: 1005 [2021-06-05 23:10:39,687 INFO L226 Difference]: Without dead ends: 979 [2021-06-05 23:10:39,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8517 ImplicationChecksByTransitivity, 6309.1ms TimeCoverageRelationStatistics Valid=1668, Invalid=22202, Unknown=0, NotChecked=0, Total=23870 [2021-06-05 23:10:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-06-05 23:10:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 479. [2021-06-05 23:10:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1297071129707112) internal successors, (1018), 478 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1018 transitions. [2021-06-05 23:10:39,693 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1018 transitions. Word has length 47 [2021-06-05 23:10:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:39,693 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1018 transitions. [2021-06-05 23:10:39,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1018 transitions. [2021-06-05 23:10:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:10:39,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:39,693 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:39,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 23:10:39,894 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash -820206049, now seen corresponding path program 204 times [2021-06-05 23:10:39,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:39,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463793499] [2021-06-05 23:10:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:10:39,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:39,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463793499] [2021-06-05 23:10:39,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463793499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:39,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826658146] [2021-06-05 23:10:39,986 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:40,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:10:40,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:10:40,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:10:40,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826658146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:40,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:40,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 23:10:40,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471753160] [2021-06-05 23:10:40,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:10:40,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:40,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:10:40,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:10:40,087 INFO L87 Difference]: Start difference. First operand 479 states and 1018 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:40,273 INFO L93 Difference]: Finished difference Result 794 states and 1629 transitions. [2021-06-05 23:10:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:10:40,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:10:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:40,274 INFO L225 Difference]: With dead ends: 794 [2021-06-05 23:10:40,274 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 23:10:40,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:10:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 23:10:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 539. [2021-06-05 23:10:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.1282527881040894) internal successors, (1145), 538 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1145 transitions. [2021-06-05 23:10:40,278 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1145 transitions. Word has length 49 [2021-06-05 23:10:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:40,279 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1145 transitions. [2021-06-05 23:10:40,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1145 transitions. [2021-06-05 23:10:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:10:40,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:40,279 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:40,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:40,480 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash -300420567, now seen corresponding path program 205 times [2021-06-05 23:10:40,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:40,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643444342] [2021-06-05 23:10:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:40,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:40,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643444342] [2021-06-05 23:10:40,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643444342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:40,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183481745] [2021-06-05 23:10:40,918 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:40,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2021-06-05 23:10:40,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:41,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183481745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:41,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:41,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-06-05 23:10:41,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39964328] [2021-06-05 23:10:41,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:10:41,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:41,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:10:41,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:10:41,667 INFO L87 Difference]: Start difference. First operand 539 states and 1145 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:48,737 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 23:10:49,956 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 23:10:53,562 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 23:10:53,733 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 23:10:55,888 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-05 23:10:56,060 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 23:10:56,260 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-06-05 23:10:56,434 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-06-05 23:10:58,331 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-06-05 23:10:58,586 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-06-05 23:10:58,766 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-06-05 23:10:58,989 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-06-05 23:10:59,643 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2021-06-05 23:11:02,427 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 23:11:05,958 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 23:11:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:15,973 INFO L93 Difference]: Finished difference Result 4196 states and 8343 transitions. [2021-06-05 23:11:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2021-06-05 23:11:15,974 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:11:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:15,977 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 23:11:15,977 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 23:11:15,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 481 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107198 ImplicationChecksByTransitivity, 30051.0ms TimeCoverageRelationStatistics Valid=25835, Invalid=206971, Unknown=0, NotChecked=0, Total=232806 [2021-06-05 23:11:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 23:11:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 953. [2021-06-05 23:11:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.1449579831932772) internal successors, (2042), 952 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2042 transitions. [2021-06-05 23:11:16,006 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2042 transitions. Word has length 49 [2021-06-05 23:11:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:16,007 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2042 transitions. [2021-06-05 23:11:16,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:16,007 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2042 transitions. [2021-06-05 23:11:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:11:16,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:16,007 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:16,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 23:11:16,208 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1788875737, now seen corresponding path program 206 times [2021-06-05 23:11:16,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:16,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825137356] [2021-06-05 23:11:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:11:16,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:16,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825137356] [2021-06-05 23:11:16,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825137356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:16,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604057052] [2021-06-05 23:11:16,608 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:16,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:16,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:16,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:11:16,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:17,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604057052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:17,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:17,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-06-05 23:11:17,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852377977] [2021-06-05 23:11:17,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:11:17,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:11:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:11:17,360 INFO L87 Difference]: Start difference. First operand 953 states and 2042 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:21,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:21,550 INFO L93 Difference]: Finished difference Result 1583 states and 3270 transitions. [2021-06-05 23:11:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-05 23:11:21,551 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:11:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:21,552 INFO L225 Difference]: With dead ends: 1583 [2021-06-05 23:11:21,552 INFO L226 Difference]: Without dead ends: 1535 [2021-06-05 23:11:21,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5681 ImplicationChecksByTransitivity, 3630.1ms TimeCoverageRelationStatistics Valid=965, Invalid=16591, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 23:11:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-05 23:11:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 875. [2021-06-05 23:11:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.151029748283753) internal successors, (1880), 874 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1880 transitions. [2021-06-05 23:11:21,561 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1880 transitions. Word has length 49 [2021-06-05 23:11:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:21,561 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1880 transitions. [2021-06-05 23:11:21,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1880 transitions. [2021-06-05 23:11:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:11:21,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:21,562 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:21,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 23:11:21,762 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 207 times [2021-06-05 23:11:21,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:21,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34842408] [2021-06-05 23:11:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:22,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34842408] [2021-06-05 23:11:22,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34842408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358814160] [2021-06-05 23:11:22,088 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:22,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 23:11:22,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:22,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-06-05 23:11:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:22,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358814160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:22,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:22,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-06-05 23:11:22,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559955598] [2021-06-05 23:11:22,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:11:22,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:22,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:11:22,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:11:22,769 INFO L87 Difference]: Start difference. First operand 875 states and 1880 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) [2021-06-05 23:11:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:25,766 INFO L93 Difference]: Finished difference Result 1900 states and 4012 transitions. [2021-06-05 23:11:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 23:11:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) Word has length 51 [2021-06-05 23:11:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:25,768 INFO L225 Difference]: With dead ends: 1900 [2021-06-05 23:11:25,768 INFO L226 Difference]: Without dead ends: 1815 [2021-06-05 23:11:25,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 2998.9ms TimeCoverageRelationStatistics Valid=1932, Invalid=13568, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 23:11:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-06-05 23:11:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1155. [2021-06-05 23:11:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.2435008665511265) internal successors, (2589), 1154 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2589 transitions. [2021-06-05 23:11:25,780 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2589 transitions. Word has length 51 [2021-06-05 23:11:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:25,780 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2589 transitions. [2021-06-05 23:11:25,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) [2021-06-05 23:11:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2589 transitions. [2021-06-05 23:11:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:11:25,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:25,781 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:25,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 23:11:25,981 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1942809299, now seen corresponding path program 208 times [2021-06-05 23:11:25,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:25,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738797423] [2021-06-05 23:11:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:26,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738797423] [2021-06-05 23:11:26,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738797423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306919646] [2021-06-05 23:11:26,308 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:26,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:26,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-06-05 23:11:26,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:26,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306919646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:26,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:26,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-06-05 23:11:26,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028617638] [2021-06-05 23:11:26,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:11:26,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:11:26,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:11:26,990 INFO L87 Difference]: Start difference. First operand 1155 states and 2589 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) [2021-06-05 23:11:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:29,989 INFO L93 Difference]: Finished difference Result 1950 states and 4095 transitions. [2021-06-05 23:11:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 23:11:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) Word has length 51 [2021-06-05 23:11:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:29,991 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 23:11:29,991 INFO L226 Difference]: Without dead ends: 1876 [2021-06-05 23:11:29,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 2981.7ms TimeCoverageRelationStatistics Valid=2016, Invalid=14754, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 23:11:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-06-05 23:11:30,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1157. [2021-06-05 23:11:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2430795847750864) internal successors, (2593), 1156 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2593 transitions. [2021-06-05 23:11:30,004 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2593 transitions. Word has length 51 [2021-06-05 23:11:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:30,004 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2593 transitions. [2021-06-05 23:11:30,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) [2021-06-05 23:11:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2593 transitions. [2021-06-05 23:11:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:11:30,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:30,005 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:30,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-06-05 23:11:30,205 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:30,206 INFO L82 PathProgramCache]: Analyzing trace with hash -539398377, now seen corresponding path program 209 times [2021-06-05 23:11:30,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:30,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409857008] [2021-06-05 23:11:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:30,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:30,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409857008] [2021-06-05 23:11:30,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409857008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:30,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378679775] [2021-06-05 23:11:30,526 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:30,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 23:11:30,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:30,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-06-05 23:11:30,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:31,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378679775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:31,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:31,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-06-05 23:11:31,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172711716] [2021-06-05 23:11:31,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:11:31,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:11:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2283, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:11:31,188 INFO L87 Difference]: Start difference. First operand 1157 states and 2593 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) [2021-06-05 23:11:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:34,373 INFO L93 Difference]: Finished difference Result 1948 states and 4093 transitions. [2021-06-05 23:11:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 23:11:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) Word has length 51 [2021-06-05 23:11:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:34,375 INFO L225 Difference]: With dead ends: 1948 [2021-06-05 23:11:34,376 INFO L226 Difference]: Without dead ends: 1880 [2021-06-05 23:11:34,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 3101.6ms TimeCoverageRelationStatistics Valid=2113, Invalid=15977, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 23:11:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-06-05 23:11:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1159. [2021-06-05 23:11:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 2.2426597582037995) internal successors, (2597), 1158 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 2597 transitions. [2021-06-05 23:11:34,393 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 2597 transitions. Word has length 51 [2021-06-05 23:11:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:34,393 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 2597 transitions. [2021-06-05 23:11:34,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) [2021-06-05 23:11:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 2597 transitions. [2021-06-05 23:11:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:11:34,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:34,394 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:34,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:34,594 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1929524315, now seen corresponding path program 210 times [2021-06-05 23:11:34,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:34,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902156197] [2021-06-05 23:11:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:34,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:34,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902156197] [2021-06-05 23:11:34,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902156197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:34,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327424785] [2021-06-05 23:11:34,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:35,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 23:11:35,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:35,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-05 23:11:35,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:35,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327424785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:35,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:35,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-06-05 23:11:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927269776] [2021-06-05 23:11:35,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:11:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:11:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:11:35,694 INFO L87 Difference]: Start difference. First operand 1159 states and 2597 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) [2021-06-05 23:11:39,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:39,362 INFO L93 Difference]: Finished difference Result 1946 states and 4091 transitions. [2021-06-05 23:11:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 23:11:39,362 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) Word has length 51 [2021-06-05 23:11:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:39,364 INFO L225 Difference]: With dead ends: 1946 [2021-06-05 23:11:39,364 INFO L226 Difference]: Without dead ends: 1884 [2021-06-05 23:11:39,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5869 ImplicationChecksByTransitivity, 3486.3ms TimeCoverageRelationStatistics Valid=2235, Invalid=17225, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 23:11:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-06-05 23:11:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1161. [2021-06-05 23:11:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.242241379310345) internal successors, (2601), 1160 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2601 transitions. [2021-06-05 23:11:39,377 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2601 transitions. Word has length 51 [2021-06-05 23:11:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:39,377 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 2601 transitions. [2021-06-05 23:11:39,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) [2021-06-05 23:11:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2601 transitions. [2021-06-05 23:11:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:11:39,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:39,378 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:39,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:39,578 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:39,578 INFO L82 PathProgramCache]: Analyzing trace with hash 425949855, now seen corresponding path program 211 times [2021-06-05 23:11:39,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:39,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933849443] [2021-06-05 23:11:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:39,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:39,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933849443] [2021-06-05 23:11:39,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933849443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:39,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165759317] [2021-06-05 23:11:39,939 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:39,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-06-05 23:11:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:40,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165759317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:40,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:40,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-06-05 23:11:40,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353168146] [2021-06-05 23:11:40,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:11:40,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:11:40,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:11:40,620 INFO L87 Difference]: Start difference. First operand 1161 states and 2601 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 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) Received shutdown request... [2021-06-05 23:11:43,842 WARN L222 SmtUtils]: Removed 6 from assertion stack [2021-06-05 23:11:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:11:44,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 23:11:44,043 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:11:44,045 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:11:44,046 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:11:44,046 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:11:44 BasicIcfg [2021-06-05 23:11:44,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:11:44,047 INFO L168 Benchmark]: Toolchain (without parser) took 728036.55 ms. Allocated memory was 364.9 MB in the beginning and 1.3 GB in the end (delta: 973.1 MB). Free memory was 344.3 MB in the beginning and 1.1 GB in the end (delta: -783.6 MB). Peak memory consumption was 193.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:11:44,047 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 364.9 MB. Free memory was 345.4 MB in the beginning and 345.3 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:11:44,047 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.14 ms. Allocated memory is still 364.9 MB. Free memory was 344.2 MB in the beginning and 342.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:11:44,047 INFO L168 Benchmark]: Boogie Preprocessor took 12.52 ms. Allocated memory is still 364.9 MB. Free memory was 342.8 MB in the beginning and 341.8 MB in the end (delta: 972.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:11:44,047 INFO L168 Benchmark]: RCFGBuilder took 260.48 ms. Allocated memory is still 364.9 MB. Free memory was 341.8 MB in the beginning and 330.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:11:44,047 INFO L168 Benchmark]: TraceAbstraction took 727732.98 ms. Allocated memory was 364.9 MB in the beginning and 1.3 GB in the end (delta: 973.1 MB). Free memory was 330.0 MB in the beginning and 1.1 GB in the end (delta: -797.9 MB). Peak memory consumption was 178.4 MB. Max. memory is 16.0 GB. [2021-06-05 23:11:44,047 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 0.14 ms. Allocated memory is still 364.9 MB. Free memory was 345.4 MB in the beginning and 345.3 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.14 ms. Allocated memory is still 364.9 MB. Free memory was 344.2 MB in the beginning and 342.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.52 ms. Allocated memory is still 364.9 MB. Free memory was 342.8 MB in the beginning and 341.8 MB in the end (delta: 972.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 260.48 ms. Allocated memory is still 364.9 MB. Free memory was 341.8 MB in the beginning and 330.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 727732.98 ms. Allocated memory was 364.9 MB in the beginning and 1.3 GB in the end (delta: 973.1 MB). Free memory was 330.0 MB in the beginning and 1.1 GB in the end (delta: -797.9 MB). Peak memory consumption was 178.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1161states) and FLOYD_HOARE automaton (currently 104 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 19 for 3ms.. - 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: TIMEOUT, OverallTime: 727594.2ms, OverallIterations: 213, TraceHistogramMax: 9, EmptinessCheckTime: 131.9ms, AutomataDifference: 536920.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9803 SDtfs, 59244 SDslu, 161358 SDs, 0 SdLazy, 372564 SolverSat, 17099 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 116782.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24611 GetRequests, 4145 SyntacticMatches, 256 SemanticMatches, 20209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822068 ImplicationChecksByTransitivity, 502748.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1161occurred in iteration=212, InterpolantAutomatonStates: 16276, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1325.6ms AutomataMinimizationTime, 212 MinimizatonAttempts, 72682 StatesRemovedByMinimization, 212 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 581.4ms SsaConstructionTime, 2768.2ms SatisfiabilityAnalysisTime, 138325.8ms InterpolantComputationTime, 15378 NumberOfCodeBlocks, 15378 NumberOfCodeBlocksAsserted, 1062 NumberOfCheckSat, 14954 ConstructedInterpolants, 0 QuantifiedInterpolants, 223662 SizeOfPredicates, 1025 NumberOfNonLiveVariables, 17178 ConjunctsInSsa, 10592 ConjunctsInUnsatCore, 424 InterpolantComputations, 2 PerfectInterpolantSequences, 4159/28565 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown