/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:16:52,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:16:52,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:16:52,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:16:53,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:16:53,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:16:53,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:16:53,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:16:53,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:16:53,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:16:53,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:16:53,089 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:16:53,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:16:53,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:16:53,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:16:53,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:16:53,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:16:53,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:16:53,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:16:53,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:16:53,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:16:53,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:16:53,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:16:53,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:16:53,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:16:53,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:16:53,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:16:53,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:16:53,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:16:53,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:16:53,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:16:53,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:16:53,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:16:53,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:16:53,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:16:53,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:16:53,094 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:16:53,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:16:53,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:16:53,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:16:53,433 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:16:53,436 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:16:53,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-07-13 19:16:53,437 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-07-13 19:16:53,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:16:53,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:16:53,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:16:53,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:16:53,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:16:53,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:16:53,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:16:53,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:16:53,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:16:53,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... [2021-07-13 19:16:53,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:16:53,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:16:53,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:16:53,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:16:53,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:16:53,574 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:16:53,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:16:53,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:16:53,575 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:16:53,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:16:53,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:16:53,575 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:16:53,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:16:53,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:16:53,576 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:16:53,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:16:53,771 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:16:53,771 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 19:16:53,772 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 19:16:53,773 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:16:53 BoogieIcfgContainer [2021-07-13 19:16:53,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:16:53,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:16:53,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:16:53,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:16:53,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:53" (1/2) ... [2021-07-13 19:16:53,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d92884d and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:16:53, skipping insertion in model container [2021-07-13 19:16:53,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:16:53" (2/2) ... [2021-07-13 19:16:53,780 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-07-13 19:16:53,785 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:16:53,785 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:16:53,785 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:16:53,786 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:16:53,808 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:16:53,827 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:16:53,843 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:16:53,843 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:16:53,843 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:16:53,843 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:16:53,843 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:16:53,843 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:16:53,843 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:16:53,844 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:16:53,851 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-13 19:16:53,861 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:53,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-13 19:16:53,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:53,868 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:53,869 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:53,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1034851945, now seen corresponding path program 1 times [2021-07-13 19:16:53,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:53,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343272891] [2021-07-13 19:16:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:54,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:54,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343272891] [2021-07-13 19:16:54,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343272891] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:16:54,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:16:54,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:16:54,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671803945] [2021-07-13 19:16:54,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:16:54,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:54,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:16:54,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:16:54,096 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,114 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-07-13 19:16:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:16:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-07-13 19:16:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:54,122 INFO L225 Difference]: With dead ends: 22 [2021-07-13 19:16:54,123 INFO L226 Difference]: Without dead ends: 19 [2021-07-13 19:16:54,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:16:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-07-13 19:16:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-07-13 19:16:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-07-13 19:16:54,153 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-07-13 19:16:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:54,154 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-07-13 19:16:54,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-07-13 19:16:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:16:54,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:54,156 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:54,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:16:54,157 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash -619637623, now seen corresponding path program 1 times [2021-07-13 19:16:54,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:54,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508637700] [2021-07-13 19:16:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:54,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:54,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508637700] [2021-07-13 19:16:54,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508637700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089146812] [2021-07-13 19:16:54,231 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 [2021-07-13 19:16:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:16:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:54,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089146812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:54,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-13 19:16:54,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279693052] [2021-07-13 19:16:54,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:16:54,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:54,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:16:54,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:16:54,385 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,429 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-07-13 19:16:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:16:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:16:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:54,432 INFO L225 Difference]: With dead ends: 28 [2021-07-13 19:16:54,432 INFO L226 Difference]: Without dead ends: 28 [2021-07-13 19:16:54,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:16:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-13 19:16:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-07-13 19:16:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-07-13 19:16:54,446 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-07-13 19:16:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:54,446 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-07-13 19:16:54,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-07-13 19:16:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:16:54,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:54,447 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:54,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:16:54,657 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2038710898, now seen corresponding path program 1 times [2021-07-13 19:16:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:54,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748050956] [2021-07-13 19:16:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:54,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:54,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748050956] [2021-07-13 19:16:54,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748050956] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:16:54,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:16:54,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:16:54,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301704584] [2021-07-13 19:16:54,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:16:54,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:54,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:16:54,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:54,688 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,724 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-07-13 19:16:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:16:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:16:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:54,729 INFO L225 Difference]: With dead ends: 22 [2021-07-13 19:16:54,729 INFO L226 Difference]: Without dead ends: 18 [2021-07-13 19:16:54,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:16:54,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-13 19:16:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-13 19:16:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-07-13 19:16:54,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-07-13 19:16:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:54,739 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-07-13 19:16:54,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-07-13 19:16:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:16:54,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:54,740 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:54,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:16:54,741 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash 298365290, now seen corresponding path program 2 times [2021-07-13 19:16:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:54,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734157917] [2021-07-13 19:16:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:54,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:54,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734157917] [2021-07-13 19:16:54,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734157917] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:16:54,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:16:54,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:16:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786356440] [2021-07-13 19:16:54,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:16:54,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:16:54,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:54,796 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,813 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-07-13 19:16:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:16:54,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:16:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:54,814 INFO L225 Difference]: With dead ends: 20 [2021-07-13 19:16:54,814 INFO L226 Difference]: Without dead ends: 20 [2021-07-13 19:16:54,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-07-13 19:16:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-07-13 19:16:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-13 19:16:54,818 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-13 19:16:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:54,818 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-13 19:16:54,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-13 19:16:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:16:54,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:54,819 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:54,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:16:54,819 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:54,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2005825454, now seen corresponding path program 1 times [2021-07-13 19:16:54,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:54,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802984459] [2021-07-13 19:16:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:54,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:54,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802984459] [2021-07-13 19:16:54,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802984459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323007384] [2021-07-13 19:16:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:16:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:54,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323007384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:54,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:16:54,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137429637] [2021-07-13 19:16:54,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:16:54,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:54,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:16:54,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:54,975 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,992 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-07-13 19:16:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:16:54,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:16:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:54,995 INFO L225 Difference]: With dead ends: 24 [2021-07-13 19:16:54,995 INFO L226 Difference]: Without dead ends: 24 [2021-07-13 19:16:54,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-07-13 19:16:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-07-13 19:16:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-07-13 19:16:55,002 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-07-13 19:16:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:55,002 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-07-13 19:16:55,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-07-13 19:16:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:16:55,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:55,003 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:55,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:55,228 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:55,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1462566514, now seen corresponding path program 2 times [2021-07-13 19:16:55,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:55,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953588233] [2021-07-13 19:16:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:55,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:55,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953588233] [2021-07-13 19:16:55,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953588233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765526553] [2021-07-13 19:16:55,291 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:55,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:55,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:55,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:55,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:55,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765526553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:55,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-13 19:16:55,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6261364] [2021-07-13 19:16:55,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:55,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:55,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:55,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:55,408 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:55,432 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-13 19:16:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:16:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 12 [2021-07-13 19:16:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:55,433 INFO L225 Difference]: With dead ends: 28 [2021-07-13 19:16:55,433 INFO L226 Difference]: Without dead ends: 28 [2021-07-13 19:16:55,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-13 19:16:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-13 19:16:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-07-13 19:16:55,437 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-07-13 19:16:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:55,437 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-07-13 19:16:55,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-07-13 19:16:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:55,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:55,438 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:55,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:55,662 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:55,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1608535122, now seen corresponding path program 3 times [2021-07-13 19:16:55,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:55,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469213950] [2021-07-13 19:16:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:55,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:55,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469213950] [2021-07-13 19:16:55,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469213950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118506008] [2021-07-13 19:16:55,712 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:55,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:16:55,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:16:55,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:55,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:55,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-13 19:16:55,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:55,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:55,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:55,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 19:16:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:55,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118506008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:55,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-13 19:16:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475265588] [2021-07-13 19:16:55,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:55,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:55,927 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:55,978 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-07-13 19:16:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:16:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:55,982 INFO L225 Difference]: With dead ends: 67 [2021-07-13 19:16:55,982 INFO L226 Difference]: Without dead ends: 64 [2021-07-13 19:16:55,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-13 19:16:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-07-13 19:16:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 82 transitions. [2021-07-13 19:16:55,997 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 82 transitions. Word has length 13 [2021-07-13 19:16:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:55,997 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 82 transitions. [2021-07-13 19:16:55,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 82 transitions. [2021-07-13 19:16:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:55,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:55,999 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:56,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:56,221 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash -942907630, now seen corresponding path program 4 times [2021-07-13 19:16:56,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:56,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865807159] [2021-07-13 19:16:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:56,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:56,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865807159] [2021-07-13 19:16:56,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865807159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919587856] [2021-07-13 19:16:56,277 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:56,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:56,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:56,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:16:56,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:56,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:56,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-13 19:16:56,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:56,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:56,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:56,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 19:16:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:56,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919587856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:56,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-13 19:16:56,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679331609] [2021-07-13 19:16:56,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:56,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:56,447 INFO L87 Difference]: Start difference. First operand 39 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:56,523 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-07-13 19:16:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:16:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:56,525 INFO L225 Difference]: With dead ends: 75 [2021-07-13 19:16:56,525 INFO L226 Difference]: Without dead ends: 72 [2021-07-13 19:16:56,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-13 19:16:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-07-13 19:16:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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) [2021-07-13 19:16:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 103 transitions. [2021-07-13 19:16:56,540 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 103 transitions. Word has length 13 [2021-07-13 19:16:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:56,541 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 103 transitions. [2021-07-13 19:16:56,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 103 transitions. [2021-07-13 19:16:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:56,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:56,543 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:56,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:16:56,757 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:56,757 INFO L82 PathProgramCache]: Analyzing trace with hash -317115318, now seen corresponding path program 5 times [2021-07-13 19:16:56,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:56,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429642470] [2021-07-13 19:16:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:56,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:56,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429642470] [2021-07-13 19:16:56,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429642470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161463341] [2021-07-13 19:16:56,794 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:56,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:16:56,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:56,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:16:56,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:56,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:56,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-13 19:16:56,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:56,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:56,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:56,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 19:16:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:56,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161463341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:56,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-13 19:16:56,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995097507] [2021-07-13 19:16:56,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:56,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:56,917 INFO L87 Difference]: Start difference. First operand 45 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:56,979 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-07-13 19:16:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:16:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:56,980 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:16:56,980 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:16:56,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:16:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-07-13 19:16:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-07-13 19:16:56,996 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-07-13 19:16:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:56,996 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-07-13 19:16:56,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-07-13 19:16:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:56,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:56,997 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:57,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:57,217 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1902577170, now seen corresponding path program 6 times [2021-07-13 19:16:57,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:57,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287495658] [2021-07-13 19:16:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:57,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:57,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287495658] [2021-07-13 19:16:57,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287495658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664468931] [2021-07-13 19:16:57,248 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:57,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:57,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:16:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:57,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:57,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-13 19:16:57,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:57,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:57,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:57,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 19:16:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664468931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:57,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-13 19:16:57,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611510277] [2021-07-13 19:16:57,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:57,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:57,411 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:57,468 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-07-13 19:16:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:16:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:57,469 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:16:57,469 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:16:57,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:16:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-07-13 19:16:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 155 transitions. [2021-07-13 19:16:57,473 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 155 transitions. Word has length 13 [2021-07-13 19:16:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:57,473 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 155 transitions. [2021-07-13 19:16:57,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 155 transitions. [2021-07-13 19:16:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:16:57,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:57,474 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:57,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:16:57,679 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:57,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1838594674, now seen corresponding path program 7 times [2021-07-13 19:16:57,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:57,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63609472] [2021-07-13 19:16:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63609472] [2021-07-13 19:16:57,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63609472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352250529] [2021-07-13 19:16:57,731 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:57,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:16:57,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352250529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:57,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:16:57,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473516019] [2021-07-13 19:16:57,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:57,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:57,871 INFO L87 Difference]: Start difference. First operand 61 states and 155 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:16:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:57,952 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-07-13 19:16:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:57,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-13 19:16:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:57,954 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:16:57,954 INFO L226 Difference]: Without dead ends: 114 [2021-07-13 19:16:57,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-13 19:16:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2021-07-13 19:16:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 159 transitions. [2021-07-13 19:16:57,963 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 159 transitions. Word has length 14 [2021-07-13 19:16:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:57,963 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 159 transitions. [2021-07-13 19:16:57,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:16:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 159 transitions. [2021-07-13 19:16:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:16:57,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:57,964 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:58,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:16:58,186 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1651947095, now seen corresponding path program 8 times [2021-07-13 19:16:58,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:58,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854911142] [2021-07-13 19:16:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:58,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:58,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854911142] [2021-07-13 19:16:58,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854911142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013535350] [2021-07-13 19:16:58,236 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:58,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:58,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:58,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:16:58,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:58,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013535350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:58,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:16:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393468068] [2021-07-13 19:16:58,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:58,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:58,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:58,321 INFO L87 Difference]: Start difference. First operand 62 states and 159 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:16:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:58,435 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-07-13 19:16:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-13 19:16:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:58,437 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:16:58,437 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 19:16:58,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 19:16:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-07-13 19:16:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-07-13 19:16:58,444 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 14 [2021-07-13 19:16:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:58,444 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-07-13 19:16:58,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:16:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-07-13 19:16:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:16:58,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:58,445 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:58,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:58,665 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1032606612, now seen corresponding path program 9 times [2021-07-13 19:16:58,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:58,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235366332] [2021-07-13 19:16:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:58,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:58,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235366332] [2021-07-13 19:16:58,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235366332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147114568] [2021-07-13 19:16:58,715 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:58,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:16:58,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:58,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:16:58,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:58,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147114568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:58,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-13 19:16:58,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114530905] [2021-07-13 19:16:58,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:58,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:58,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:58,850 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:59,120 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2021-07-13 19:16:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:16:59,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:16:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:59,122 INFO L225 Difference]: With dead ends: 137 [2021-07-13 19:16:59,122 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:16:59,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:16:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:16:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-07-13 19:16:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 269 transitions. [2021-07-13 19:16:59,128 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 269 transitions. Word has length 14 [2021-07-13 19:16:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:59,129 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 269 transitions. [2021-07-13 19:16:59,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 269 transitions. [2021-07-13 19:16:59,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:16:59,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:59,134 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:59,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:59,349 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1949662965, now seen corresponding path program 10 times [2021-07-13 19:16:59,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:59,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383157612] [2021-07-13 19:16:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:59,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383157612] [2021-07-13 19:16:59,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383157612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117443990] [2021-07-13 19:16:59,403 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:59,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:59,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:59,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:16:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117443990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:59,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:16:59,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407484992] [2021-07-13 19:16:59,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:59,485 INFO L87 Difference]: Start difference. First operand 104 states and 269 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:16:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:59,526 INFO L93 Difference]: Finished difference Result 162 states and 349 transitions. [2021-07-13 19:16:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-13 19:16:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:59,527 INFO L225 Difference]: With dead ends: 162 [2021-07-13 19:16:59,527 INFO L226 Difference]: Without dead ends: 162 [2021-07-13 19:16:59,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-13 19:16:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-07-13 19:16:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6153846153846154) internal successors, (272), 104 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2021-07-13 19:16:59,532 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 14 [2021-07-13 19:16:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:59,532 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2021-07-13 19:16:59,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:16:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2021-07-13 19:16:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:16:59,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:59,533 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:59,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:16:59,749 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash 857706217, now seen corresponding path program 11 times [2021-07-13 19:16:59,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:59,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208717741] [2021-07-13 19:16:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:59,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:59,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208717741] [2021-07-13 19:16:59,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208717741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121066863] [2021-07-13 19:16:59,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:59,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:16:59,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:16:59,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:59,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121066863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:59,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:16:59,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938028718] [2021-07-13 19:16:59,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:59,868 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:16:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:59,949 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-07-13 19:16:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-13 19:16:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:59,951 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:16:59,951 INFO L226 Difference]: Without dead ends: 168 [2021-07-13 19:16:59,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-13 19:16:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-07-13 19:16:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-07-13 19:16:59,956 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-07-13 19:16:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:59,956 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-07-13 19:16:59,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:16:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-07-13 19:16:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:16:59,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:59,957 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:00,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:17:00,173 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1719512019, now seen corresponding path program 12 times [2021-07-13 19:17:00,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:00,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179055509] [2021-07-13 19:17:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:00,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179055509] [2021-07-13 19:17:00,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179055509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339416860] [2021-07-13 19:17:00,232 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:00,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:17:00,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339416860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:00,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:17:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655485085] [2021-07-13 19:17:00,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:17:00,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:17:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:17:00,315 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:17:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:00,351 INFO L93 Difference]: Finished difference Result 174 states and 379 transitions. [2021-07-13 19:17:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:17:00,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-13 19:17:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:00,352 INFO L225 Difference]: With dead ends: 174 [2021-07-13 19:17:00,352 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 19:17:00,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:00,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 19:17:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 112. [2021-07-13 19:17:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-07-13 19:17:00,358 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-07-13 19:17:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:00,358 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-07-13 19:17:00,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:17:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-07-13 19:17:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:00,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:00,358 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:00,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:17:00,582 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:00,583 INFO L82 PathProgramCache]: Analyzing trace with hash 846407943, now seen corresponding path program 13 times [2021-07-13 19:17:00,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:00,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899663413] [2021-07-13 19:17:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:00,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899663413] [2021-07-13 19:17:00,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899663413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019844374] [2021-07-13 19:17:00,618 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019844374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:00,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:17:00,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082633215] [2021-07-13 19:17:00,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:00,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:00,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:00,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:00,709 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:17:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:00,777 INFO L93 Difference]: Finished difference Result 188 states and 405 transitions. [2021-07-13 19:17:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:00,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-13 19:17:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:00,778 INFO L225 Difference]: With dead ends: 188 [2021-07-13 19:17:00,778 INFO L226 Difference]: Without dead ends: 188 [2021-07-13 19:17:00,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-13 19:17:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-07-13 19:17:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.663716814159292) internal successors, (301), 113 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 301 transitions. [2021-07-13 19:17:00,783 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 301 transitions. Word has length 14 [2021-07-13 19:17:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:00,783 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 301 transitions. [2021-07-13 19:17:00,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:17:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 301 transitions. [2021-07-13 19:17:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:00,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:00,784 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:00,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:00,999 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568591, now seen corresponding path program 14 times [2021-07-13 19:17:00,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:00,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649312235] [2021-07-13 19:17:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:01,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649312235] [2021-07-13 19:17:01,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649312235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538447745] [2021-07-13 19:17:01,038 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:01,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:01,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:01,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538447745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:01,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:17:01,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004392830] [2021-07-13 19:17:01,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:17:01,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:01,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:17:01,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:17:01,103 INFO L87 Difference]: Start difference. First operand 114 states and 301 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:17:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:01,177 INFO L93 Difference]: Finished difference Result 182 states and 405 transitions. [2021-07-13 19:17:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-13 19:17:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:01,178 INFO L225 Difference]: With dead ends: 182 [2021-07-13 19:17:01,178 INFO L226 Difference]: Without dead ends: 180 [2021-07-13 19:17:01,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-13 19:17:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-07-13 19:17:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-07-13 19:17:01,183 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-07-13 19:17:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:01,183 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-07-13 19:17:01,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:17:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-07-13 19:17:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:01,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:01,184 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:01,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:17:01,397 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash 500180469, now seen corresponding path program 15 times [2021-07-13 19:17:01,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:01,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053732164] [2021-07-13 19:17:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:01,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053732164] [2021-07-13 19:17:01,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053732164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176269693] [2021-07-13 19:17:01,434 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:01,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:01,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:01,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:01,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176269693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:01,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:17:01,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307210140] [2021-07-13 19:17:01,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:17:01,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:17:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:17:01,499 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:17:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:01,541 INFO L93 Difference]: Finished difference Result 185 states and 412 transitions. [2021-07-13 19:17:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:17:01,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-07-13 19:17:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:01,543 INFO L225 Difference]: With dead ends: 185 [2021-07-13 19:17:01,543 INFO L226 Difference]: Without dead ends: 185 [2021-07-13 19:17:01,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-13 19:17:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 124. [2021-07-13 19:17:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-07-13 19:17:01,548 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-07-13 19:17:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:01,548 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-07-13 19:17:01,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-07-13 19:17:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-07-13 19:17:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:01,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:01,549 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:01,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:01,771 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1228866865, now seen corresponding path program 16 times [2021-07-13 19:17:01,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:01,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563264292] [2021-07-13 19:17:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:01,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563264292] [2021-07-13 19:17:01,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563264292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987817158] [2021-07-13 19:17:01,807 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:01,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:01,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987817158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:01,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:17:01,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998994489] [2021-07-13 19:17:01,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:01,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:01,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:01,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:01,895 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:17:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:01,960 INFO L93 Difference]: Finished difference Result 194 states and 429 transitions. [2021-07-13 19:17:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-13 19:17:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:01,961 INFO L225 Difference]: With dead ends: 194 [2021-07-13 19:17:01,961 INFO L226 Difference]: Without dead ends: 194 [2021-07-13 19:17:01,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-13 19:17:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-07-13 19:17:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-07-13 19:17:01,966 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-07-13 19:17:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:01,966 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-07-13 19:17:01,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:17:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-07-13 19:17:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:01,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:01,967 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:02,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:17:02,185 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1005240629, now seen corresponding path program 17 times [2021-07-13 19:17:02,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:02,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818656624] [2021-07-13 19:17:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:02,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:02,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818656624] [2021-07-13 19:17:02,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818656624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552268778] [2021-07-13 19:17:02,223 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:02,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:17:02,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:02,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:02,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552268778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:02,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:17:02,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627331641] [2021-07-13 19:17:02,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:02,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:02,314 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:17:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:02,409 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2021-07-13 19:17:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-07-13 19:17:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:02,410 INFO L225 Difference]: With dead ends: 201 [2021-07-13 19:17:02,410 INFO L226 Difference]: Without dead ends: 201 [2021-07-13 19:17:02,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-13 19:17:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 132. [2021-07-13 19:17:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7404580152671754) internal successors, (359), 131 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 359 transitions. [2021-07-13 19:17:02,415 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 359 transitions. Word has length 14 [2021-07-13 19:17:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:02,415 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 359 transitions. [2021-07-13 19:17:02,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:17:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 359 transitions. [2021-07-13 19:17:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:02,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:02,416 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:02,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 19:17:02,636 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1126578199, now seen corresponding path program 18 times [2021-07-13 19:17:02,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:02,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140695583] [2021-07-13 19:17:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:02,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:02,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140695583] [2021-07-13 19:17:02,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140695583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764748944] [2021-07-13 19:17:02,682 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:02,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:17:02,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:02,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:02,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764748944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:02,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 19:17:02,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873588891] [2021-07-13 19:17:02,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:02,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:02,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:02,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:02,755 INFO L87 Difference]: Start difference. First operand 132 states and 359 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:02,851 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2021-07-13 19:17:02,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:02,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:17:02,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:02,852 INFO L225 Difference]: With dead ends: 208 [2021-07-13 19:17:02,852 INFO L226 Difference]: Without dead ends: 206 [2021-07-13 19:17:02,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-13 19:17:02,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-07-13 19:17:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8) internal successors, (420), 150 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 420 transitions. [2021-07-13 19:17:02,866 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 420 transitions. Word has length 14 [2021-07-13 19:17:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:02,866 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 420 transitions. [2021-07-13 19:17:02,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 420 transitions. [2021-07-13 19:17:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:02,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:02,868 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:03,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:03,089 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash 591170861, now seen corresponding path program 19 times [2021-07-13 19:17:03,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:03,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123573306] [2021-07-13 19:17:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:03,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:03,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123573306] [2021-07-13 19:17:03,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123573306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632813660] [2021-07-13 19:17:03,134 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:03,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:03,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:03,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632813660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:03,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 19:17:03,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63501118] [2021-07-13 19:17:03,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:03,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:03,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:03,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:03,220 INFO L87 Difference]: Start difference. First operand 151 states and 420 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:03,288 INFO L93 Difference]: Finished difference Result 199 states and 469 transitions. [2021-07-13 19:17:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:03,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:17:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:03,290 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:17:03,290 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:17:03,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:17:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-07-13 19:17:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7687074829931975) internal successors, (407), 147 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 407 transitions. [2021-07-13 19:17:03,294 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 407 transitions. Word has length 14 [2021-07-13 19:17:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:03,295 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 407 transitions. [2021-07-13 19:17:03,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 407 transitions. [2021-07-13 19:17:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:03,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:03,295 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:03,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:17:03,513 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:03,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1137876473, now seen corresponding path program 20 times [2021-07-13 19:17:03,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:03,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92673194] [2021-07-13 19:17:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:03,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:03,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92673194] [2021-07-13 19:17:03,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92673194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981908538] [2021-07-13 19:17:03,550 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:03,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:03,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:03,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:03,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981908538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:03,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:17:03,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132749650] [2021-07-13 19:17:03,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:03,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:03,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:03,625 INFO L87 Difference]: Start difference. First operand 148 states and 407 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:03,737 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2021-07-13 19:17:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:17:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:03,739 INFO L225 Difference]: With dead ends: 203 [2021-07-13 19:17:03,739 INFO L226 Difference]: Without dead ends: 203 [2021-07-13 19:17:03,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-13 19:17:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-07-13 19:17:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.7482517482517483) internal successors, (393), 143 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 393 transitions. [2021-07-13 19:17:03,743 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 393 transitions. Word has length 14 [2021-07-13 19:17:03,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:03,744 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 393 transitions. [2021-07-13 19:17:03,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 393 transitions. [2021-07-13 19:17:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:03,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:03,745 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:03,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:17:03,966 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1096231021, now seen corresponding path program 21 times [2021-07-13 19:17:03,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:03,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81519866] [2021-07-13 19:17:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:04,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:04,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81519866] [2021-07-13 19:17:04,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81519866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575815684] [2021-07-13 19:17:04,021 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:04,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:04,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575815684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:04,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:17:04,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174862704] [2021-07-13 19:17:04,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:04,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:04,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:04,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:04,096 INFO L87 Difference]: Start difference. First operand 144 states and 393 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:04,187 INFO L93 Difference]: Finished difference Result 179 states and 442 transitions. [2021-07-13 19:17:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:04,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:17:04,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:04,188 INFO L225 Difference]: With dead ends: 179 [2021-07-13 19:17:04,188 INFO L226 Difference]: Without dead ends: 179 [2021-07-13 19:17:04,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-13 19:17:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-07-13 19:17:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7357142857142858) internal successors, (383), 140 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 383 transitions. [2021-07-13 19:17:04,199 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 383 transitions. Word has length 14 [2021-07-13 19:17:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:04,199 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 383 transitions. [2021-07-13 19:17:04,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 383 transitions. [2021-07-13 19:17:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:17:04,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:04,224 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:04,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:04,445 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1634086599, now seen corresponding path program 22 times [2021-07-13 19:17:04,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:04,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304356397] [2021-07-13 19:17:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:04,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:04,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304356397] [2021-07-13 19:17:04,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304356397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803729604] [2021-07-13 19:17:04,487 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:04,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:04,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:04,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:04,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:04,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803729604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:04,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:17:04,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730715450] [2021-07-13 19:17:04,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:04,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:04,592 INFO L87 Difference]: Start difference. First operand 141 states and 383 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:04,734 INFO L93 Difference]: Finished difference Result 200 states and 499 transitions. [2021-07-13 19:17:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:17:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:04,746 INFO L225 Difference]: With dead ends: 200 [2021-07-13 19:17:04,746 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:17:04,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:17:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2021-07-13 19:17:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.74468085106383) internal successors, (387), 141 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 387 transitions. [2021-07-13 19:17:04,750 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 387 transitions. Word has length 14 [2021-07-13 19:17:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:04,750 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 387 transitions. [2021-07-13 19:17:04,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 387 transitions. [2021-07-13 19:17:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:04,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:04,751 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:04,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:17:04,973 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:04,973 INFO L82 PathProgramCache]: Analyzing trace with hash 674548242, now seen corresponding path program 23 times [2021-07-13 19:17:04,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:04,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639276426] [2021-07-13 19:17:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:05,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639276426] [2021-07-13 19:17:05,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639276426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271701428] [2021-07-13 19:17:05,012 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:05,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:05,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:05,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:05,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271701428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:05,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 19:17:05,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945992983] [2021-07-13 19:17:05,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:05,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:05,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:05,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:05,088 INFO L87 Difference]: Start difference. First operand 142 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:05,132 INFO L93 Difference]: Finished difference Result 197 states and 465 transitions. [2021-07-13 19:17:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:17:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:05,135 INFO L225 Difference]: With dead ends: 197 [2021-07-13 19:17:05,135 INFO L226 Difference]: Without dead ends: 197 [2021-07-13 19:17:05,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-13 19:17:05,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-07-13 19:17:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.7448275862068967) internal successors, (398), 145 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 398 transitions. [2021-07-13 19:17:05,139 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 398 transitions. Word has length 15 [2021-07-13 19:17:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:05,139 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 398 transitions. [2021-07-13 19:17:05,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 398 transitions. [2021-07-13 19:17:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:05,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:05,140 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:05,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:05,353 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:05,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:05,353 INFO L82 PathProgramCache]: Analyzing trace with hash -164351056, now seen corresponding path program 24 times [2021-07-13 19:17:05,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:05,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685898731] [2021-07-13 19:17:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:05,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:05,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685898731] [2021-07-13 19:17:05,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685898731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858507351] [2021-07-13 19:17:05,401 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:05,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:17:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:05,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:05,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858507351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:05,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-07-13 19:17:05,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244604286] [2021-07-13 19:17:05,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:05,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:05,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:05,471 INFO L87 Difference]: Start difference. First operand 146 states and 398 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:05,553 INFO L93 Difference]: Finished difference Result 194 states and 457 transitions. [2021-07-13 19:17:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:05,555 INFO L225 Difference]: With dead ends: 194 [2021-07-13 19:17:05,555 INFO L226 Difference]: Without dead ends: 192 [2021-07-13 19:17:05,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-13 19:17:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2021-07-13 19:17:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.731034482758621) internal successors, (396), 145 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) [2021-07-13 19:17:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 396 transitions. [2021-07-13 19:17:05,561 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 396 transitions. Word has length 15 [2021-07-13 19:17:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:05,561 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 396 transitions. [2021-07-13 19:17:05,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 396 transitions. [2021-07-13 19:17:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:05,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:05,562 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:05,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:17:05,784 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1325053940, now seen corresponding path program 25 times [2021-07-13 19:17:05,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:05,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244912821] [2021-07-13 19:17:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:05,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:05,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244912821] [2021-07-13 19:17:05,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244912821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927681573] [2021-07-13 19:17:05,831 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:05,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:05,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:05,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927681573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:05,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-13 19:17:05,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394396264] [2021-07-13 19:17:05,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:05,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:05,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:05,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:05,907 INFO L87 Difference]: Start difference. First operand 146 states and 396 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:06,007 INFO L93 Difference]: Finished difference Result 179 states and 439 transitions. [2021-07-13 19:17:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:06,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:06,008 INFO L225 Difference]: With dead ends: 179 [2021-07-13 19:17:06,008 INFO L226 Difference]: Without dead ends: 176 [2021-07-13 19:17:06,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-13 19:17:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-07-13 19:17:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.719178082191781) internal successors, (397), 146 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 397 transitions. [2021-07-13 19:17:06,014 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 397 transitions. Word has length 15 [2021-07-13 19:17:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:06,014 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 397 transitions. [2021-07-13 19:17:06,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 397 transitions. [2021-07-13 19:17:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:06,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:06,015 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:06,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:17:06,238 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash 765538634, now seen corresponding path program 26 times [2021-07-13 19:17:06,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:06,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380163395] [2021-07-13 19:17:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:06,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380163395] [2021-07-13 19:17:06,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380163395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487696204] [2021-07-13 19:17:06,273 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:06,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:06,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487696204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:06,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 19:17:06,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638985686] [2021-07-13 19:17:06,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:06,341 INFO L87 Difference]: Start difference. First operand 147 states and 397 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:06,393 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-07-13 19:17:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:17:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:06,394 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:17:06,394 INFO L226 Difference]: Without dead ends: 220 [2021-07-13 19:17:06,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-13 19:17:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 151. [2021-07-13 19:17:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7333333333333334) internal successors, (410), 150 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 410 transitions. [2021-07-13 19:17:06,399 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 410 transitions. Word has length 15 [2021-07-13 19:17:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:06,399 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 410 transitions. [2021-07-13 19:17:06,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 410 transitions. [2021-07-13 19:17:06,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:06,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:06,400 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:06,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 19:17:06,613 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash -73360664, now seen corresponding path program 27 times [2021-07-13 19:17:06,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:06,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200766700] [2021-07-13 19:17:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:06,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:06,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200766700] [2021-07-13 19:17:06,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200766700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452057331] [2021-07-13 19:17:06,653 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:06,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:06,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:06,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:17:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:06,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452057331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:06,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:17:06,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469951672] [2021-07-13 19:17:06,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:17:06,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:06,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:17:06,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:17:06,717 INFO L87 Difference]: Start difference. First operand 151 states and 410 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:06,798 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2021-07-13 19:17:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:06,799 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:17:06,799 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:17:06,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:17:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2021-07-13 19:17:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.72) internal successors, (408), 150 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 408 transitions. [2021-07-13 19:17:06,804 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 408 transitions. Word has length 15 [2021-07-13 19:17:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:06,804 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 408 transitions. [2021-07-13 19:17:06,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 408 transitions. [2021-07-13 19:17:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:06,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:06,805 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:07,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:07,025 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1416044332, now seen corresponding path program 28 times [2021-07-13 19:17:07,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:07,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853353752] [2021-07-13 19:17:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:07,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:07,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853353752] [2021-07-13 19:17:07,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853353752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049436752] [2021-07-13 19:17:07,064 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:07,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:07,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:07,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:07,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049436752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:07,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-13 19:17:07,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092495382] [2021-07-13 19:17:07,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:07,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:07,135 INFO L87 Difference]: Start difference. First operand 151 states and 408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:07,223 INFO L93 Difference]: Finished difference Result 212 states and 487 transitions. [2021-07-13 19:17:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:07,225 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:17:07,225 INFO L226 Difference]: Without dead ends: 209 [2021-07-13 19:17:07,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-13 19:17:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 151. [2021-07-13 19:17:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7133333333333334) internal successors, (407), 150 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 407 transitions. [2021-07-13 19:17:07,230 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 407 transitions. Word has length 15 [2021-07-13 19:17:07,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:07,230 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 407 transitions. [2021-07-13 19:17:07,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 407 transitions. [2021-07-13 19:17:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:07,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:07,231 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:07,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 19:17:07,454 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:07,455 INFO L82 PathProgramCache]: Analyzing trace with hash 342958952, now seen corresponding path program 29 times [2021-07-13 19:17:07,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:07,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008136799] [2021-07-13 19:17:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:07,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:07,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008136799] [2021-07-13 19:17:07,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008136799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977978313] [2021-07-13 19:17:07,513 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:07,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:07,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:07,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:07,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:07,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977978313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:07,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-13 19:17:07,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453422671] [2021-07-13 19:17:07,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:07,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:07,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:07,597 INFO L87 Difference]: Start difference. First operand 151 states and 407 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:07,662 INFO L93 Difference]: Finished difference Result 182 states and 465 transitions. [2021-07-13 19:17:07,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:07,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:07,663 INFO L225 Difference]: With dead ends: 182 [2021-07-13 19:17:07,663 INFO L226 Difference]: Without dead ends: 179 [2021-07-13 19:17:07,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-13 19:17:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-07-13 19:17:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7066666666666666) internal successors, (406), 150 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 406 transitions. [2021-07-13 19:17:07,667 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 406 transitions. Word has length 15 [2021-07-13 19:17:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:07,667 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 406 transitions. [2021-07-13 19:17:07,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 406 transitions. [2021-07-13 19:17:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:07,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:07,668 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:07,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:07,891 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash -708726510, now seen corresponding path program 30 times [2021-07-13 19:17:07,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:07,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470663739] [2021-07-13 19:17:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:07,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:07,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470663739] [2021-07-13 19:17:07,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470663739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406152244] [2021-07-13 19:17:07,937 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:07,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:07,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:07,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:07,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:08,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406152244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:08,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-07-13 19:17:08,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306932781] [2021-07-13 19:17:08,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:08,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:08,027 INFO L87 Difference]: Start difference. First operand 151 states and 406 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:08,092 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2021-07-13 19:17:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:08,094 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:17:08,094 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:17:08,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:17:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 175. [2021-07-13 19:17:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.839080459770115) internal successors, (494), 174 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 494 transitions. [2021-07-13 19:17:08,099 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 494 transitions. Word has length 15 [2021-07-13 19:17:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:08,100 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 494 transitions. [2021-07-13 19:17:08,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 494 transitions. [2021-07-13 19:17:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:08,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:08,101 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:08,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 19:17:08,321 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:08,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1547625808, now seen corresponding path program 31 times [2021-07-13 19:17:08,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:08,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449483750] [2021-07-13 19:17:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:08,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:08,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449483750] [2021-07-13 19:17:08,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449483750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12419551] [2021-07-13 19:17:08,362 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:08,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:08,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:08,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12419551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:08,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-07-13 19:17:08,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126223045] [2021-07-13 19:17:08,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:08,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:08,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:08,428 INFO L87 Difference]: Start difference. First operand 175 states and 494 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:08,497 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2021-07-13 19:17:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:08,499 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:17:08,499 INFO L226 Difference]: Without dead ends: 240 [2021-07-13 19:17:08,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-13 19:17:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2021-07-13 19:17:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8275862068965516) internal successors, (492), 174 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 492 transitions. [2021-07-13 19:17:08,504 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 492 transitions. Word has length 15 [2021-07-13 19:17:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:08,504 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 492 transitions. [2021-07-13 19:17:08,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 492 transitions. [2021-07-13 19:17:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:08,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:08,505 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:08,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:17:08,727 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash -58220812, now seen corresponding path program 32 times [2021-07-13 19:17:08,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:08,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171336312] [2021-07-13 19:17:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:08,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:08,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171336312] [2021-07-13 19:17:08,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171336312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802650659] [2021-07-13 19:17:08,772 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:08,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:08,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802650659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:08,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 19:17:08,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183190501] [2021-07-13 19:17:08,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:08,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:08,839 INFO L87 Difference]: Start difference. First operand 175 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:08,963 INFO L93 Difference]: Finished difference Result 247 states and 596 transitions. [2021-07-13 19:17:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:08,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:08,965 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:17:08,965 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 19:17:08,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 19:17:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 179. [2021-07-13 19:17:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.842696629213483) internal successors, (506), 178 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 506 transitions. [2021-07-13 19:17:08,971 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 506 transitions. Word has length 15 [2021-07-13 19:17:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:08,972 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 506 transitions. [2021-07-13 19:17:08,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 506 transitions. [2021-07-13 19:17:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:08,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:08,973 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:09,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 19:17:09,195 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1131306192, now seen corresponding path program 33 times [2021-07-13 19:17:09,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:09,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910856621] [2021-07-13 19:17:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:09,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:09,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910856621] [2021-07-13 19:17:09,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910856621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:09,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849038141] [2021-07-13 19:17:09,243 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:09,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:17:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:09,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849038141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:09,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:09,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 19:17:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404166966] [2021-07-13 19:17:09,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:09,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:09,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:09,310 INFO L87 Difference]: Start difference. First operand 179 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:09,393 INFO L93 Difference]: Finished difference Result 219 states and 577 transitions. [2021-07-13 19:17:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:09,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:09,394 INFO L225 Difference]: With dead ends: 219 [2021-07-13 19:17:09,394 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:17:09,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:17:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2021-07-13 19:17:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2021-07-13 19:17:09,399 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2021-07-13 19:17:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:09,399 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2021-07-13 19:17:09,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2021-07-13 19:17:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:17:09,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:09,400 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:09,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:17:09,621 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -37214604, now seen corresponding path program 34 times [2021-07-13 19:17:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:09,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251825750] [2021-07-13 19:17:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:09,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:09,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251825750] [2021-07-13 19:17:09,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251825750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:09,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294201971] [2021-07-13 19:17:09,666 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 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 [2021-07-13 19:17:09,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:09,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:17:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:09,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294201971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:09,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:09,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 19:17:09,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475096570] [2021-07-13 19:17:09,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:09,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:09,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:09,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:09,735 INFO L87 Difference]: Start difference. First operand 179 states and 505 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:09,832 INFO L93 Difference]: Finished difference Result 212 states and 567 transitions. [2021-07-13 19:17:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:17:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:09,833 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:17:09,833 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 19:17:09,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 19:17:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-07-13 19:17:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.831460674157303) internal successors, (504), 178 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 504 transitions. [2021-07-13 19:17:09,838 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 504 transitions. Word has length 15 [2021-07-13 19:17:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:09,838 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 504 transitions. [2021-07-13 19:17:09,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 504 transitions. [2021-07-13 19:17:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:17:09,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:09,839 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:10,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:17:10,053 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1066138199, now seen corresponding path program 35 times [2021-07-13 19:17:10,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:10,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569207073] [2021-07-13 19:17:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:10,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:10,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569207073] [2021-07-13 19:17:10,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569207073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274228749] [2021-07-13 19:17:10,121 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:10,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:10,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:10,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:17:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:10,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274228749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:10,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:17:10,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578018854] [2021-07-13 19:17:10,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:10,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:10,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:10,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:10,226 INFO L87 Difference]: Start difference. First operand 179 states and 504 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:10,332 INFO L93 Difference]: Finished difference Result 452 states and 1210 transitions. [2021-07-13 19:17:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:17:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:10,335 INFO L225 Difference]: With dead ends: 452 [2021-07-13 19:17:10,335 INFO L226 Difference]: Without dead ends: 448 [2021-07-13 19:17:10,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-07-13 19:17:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 236. [2021-07-13 19:17:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.748936170212766) internal successors, (646), 235 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) [2021-07-13 19:17:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 646 transitions. [2021-07-13 19:17:10,342 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 646 transitions. Word has length 16 [2021-07-13 19:17:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:10,343 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 646 transitions. [2021-07-13 19:17:10,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 646 transitions. [2021-07-13 19:17:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:17:10,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:10,343 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:10,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:17:10,557 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2129828983, now seen corresponding path program 36 times [2021-07-13 19:17:10,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:10,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376878640] [2021-07-13 19:17:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:10,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:10,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376878640] [2021-07-13 19:17:10,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376878640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88820057] [2021-07-13 19:17:10,603 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:10,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:17:10,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:10,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:17:10,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:10,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:10,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:17:11,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:11,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:11,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:11,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:17:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:11,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88820057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:11,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:17:11,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280764107] [2021-07-13 19:17:11,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:11,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:11,161 INFO L87 Difference]: Start difference. First operand 236 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:11,263 INFO L93 Difference]: Finished difference Result 318 states and 823 transitions. [2021-07-13 19:17:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:11,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:17:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:11,265 INFO L225 Difference]: With dead ends: 318 [2021-07-13 19:17:11,265 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 19:17:11,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 19:17:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2021-07-13 19:17:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7420494699646643) internal successors, (776), 283 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 776 transitions. [2021-07-13 19:17:11,271 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 776 transitions. Word has length 17 [2021-07-13 19:17:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:11,271 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 776 transitions. [2021-07-13 19:17:11,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 776 transitions. [2021-07-13 19:17:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:17:11,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:11,273 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:11,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 19:17:11,495 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:11,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash 368526055, now seen corresponding path program 37 times [2021-07-13 19:17:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:11,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049481569] [2021-07-13 19:17:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:11,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:11,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049481569] [2021-07-13 19:17:11,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049481569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076115182] [2021-07-13 19:17:11,542 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:11,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:17:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:11,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:11,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:17:11,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:11,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:11,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:11,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:17:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:11,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076115182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:11,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:17:11,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702080392] [2021-07-13 19:17:11,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:11,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:11,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:11,922 INFO L87 Difference]: Start difference. First operand 284 states and 776 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:12,031 INFO L93 Difference]: Finished difference Result 363 states and 957 transitions. [2021-07-13 19:17:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:12,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:17:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:12,033 INFO L225 Difference]: With dead ends: 363 [2021-07-13 19:17:12,033 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:17:12,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:17:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 326. [2021-07-13 19:17:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.766153846153846) internal successors, (899), 325 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 899 transitions. [2021-07-13 19:17:12,040 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 899 transitions. Word has length 17 [2021-07-13 19:17:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:12,040 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 899 transitions. [2021-07-13 19:17:12,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 899 transitions. [2021-07-13 19:17:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:17:12,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:12,041 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:12,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:12,258 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash 527358741, now seen corresponding path program 38 times [2021-07-13 19:17:12,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:12,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743815027] [2021-07-13 19:17:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:12,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:12,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743815027] [2021-07-13 19:17:12,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743815027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:12,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984650631] [2021-07-13 19:17:12,306 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:12,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:12,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:17:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:12,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:17:12,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:12,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:12,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:12,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:17:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:12,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984650631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:12,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:12,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:17:12,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106601216] [2021-07-13 19:17:12,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:12,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:12,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:12,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:12,843 INFO L87 Difference]: Start difference. First operand 326 states and 899 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:12,945 INFO L93 Difference]: Finished difference Result 412 states and 1100 transitions. [2021-07-13 19:17:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:12,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:17:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:12,947 INFO L225 Difference]: With dead ends: 412 [2021-07-13 19:17:12,948 INFO L226 Difference]: Without dead ends: 408 [2021-07-13 19:17:12,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-13 19:17:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 370. [2021-07-13 19:17:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8048780487804876) internal successors, (1035), 369 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1035 transitions. [2021-07-13 19:17:12,956 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1035 transitions. Word has length 17 [2021-07-13 19:17:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:12,956 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1035 transitions. [2021-07-13 19:17:12,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1035 transitions. [2021-07-13 19:17:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:17:12,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:12,957 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:13,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 19:17:13,180 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:13,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1156204711, now seen corresponding path program 39 times [2021-07-13 19:17:13,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:13,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725476668] [2021-07-13 19:17:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:13,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:13,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725476668] [2021-07-13 19:17:13,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725476668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:13,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018739297] [2021-07-13 19:17:13,224 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:13,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:13,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:13,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:17:13,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:13,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:13,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:17:13,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:13,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:13,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:13,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:17:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:13,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018739297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:13,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:13,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:17:13,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416072082] [2021-07-13 19:17:13,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:13,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:13,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:13,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:13,693 INFO L87 Difference]: Start difference. First operand 370 states and 1035 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:13,837 INFO L93 Difference]: Finished difference Result 474 states and 1277 transitions. [2021-07-13 19:17:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:13,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:17:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:13,840 INFO L225 Difference]: With dead ends: 474 [2021-07-13 19:17:13,840 INFO L226 Difference]: Without dead ends: 470 [2021-07-13 19:17:13,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-13 19:17:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 421. [2021-07-13 19:17:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.85) internal successors, (1197), 420 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1197 transitions. [2021-07-13 19:17:13,850 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1197 transitions. Word has length 17 [2021-07-13 19:17:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:13,851 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1197 transitions. [2021-07-13 19:17:13,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1197 transitions. [2021-07-13 19:17:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:17:13,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:13,853 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:14,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:14,069 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:14,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash -824406699, now seen corresponding path program 40 times [2021-07-13 19:17:14,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:14,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947482086] [2021-07-13 19:17:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:14,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:14,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947482086] [2021-07-13 19:17:14,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947482086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:14,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92138300] [2021-07-13 19:17:14,117 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:14,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:17:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:14,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:14,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:17:14,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:14,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:14,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:14,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:17:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:14,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92138300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:14,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:14,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:17:14,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970201815] [2021-07-13 19:17:14,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:14,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:14,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:14,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:14,519 INFO L87 Difference]: Start difference. First operand 421 states and 1197 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:14,626 INFO L93 Difference]: Finished difference Result 501 states and 1382 transitions. [2021-07-13 19:17:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:17:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:14,628 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:17:14,628 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:17:14,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:17:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 462. [2021-07-13 19:17:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.8720173535791758) internal successors, (1324), 461 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1324 transitions. [2021-07-13 19:17:14,639 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1324 transitions. Word has length 17 [2021-07-13 19:17:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:14,639 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1324 transitions. [2021-07-13 19:17:14,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1324 transitions. [2021-07-13 19:17:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:17:14,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:14,641 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:14,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-13 19:17:14,863 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:14,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:14,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2093818265, now seen corresponding path program 41 times [2021-07-13 19:17:14,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:14,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995079524] [2021-07-13 19:17:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:14,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:14,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995079524] [2021-07-13 19:17:14,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995079524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:14,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790049315] [2021-07-13 19:17:14,908 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:14,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:14,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:17:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:15,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:15,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:17:15,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:15,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:15,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:15,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:17:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:15,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790049315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:15,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:17:15,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785523851] [2021-07-13 19:17:15,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:15,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:15,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:15,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:15,360 INFO L87 Difference]: Start difference. First operand 462 states and 1324 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:15,481 INFO L93 Difference]: Finished difference Result 537 states and 1487 transitions. [2021-07-13 19:17:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:17:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:15,483 INFO L225 Difference]: With dead ends: 537 [2021-07-13 19:17:15,483 INFO L226 Difference]: Without dead ends: 534 [2021-07-13 19:17:15,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-13 19:17:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2021-07-13 19:17:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.8891129032258065) internal successors, (1433), 496 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1433 transitions. [2021-07-13 19:17:15,494 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1433 transitions. Word has length 17 [2021-07-13 19:17:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:15,494 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1433 transitions. [2021-07-13 19:17:15,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1433 transitions. [2021-07-13 19:17:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:17:15,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:15,495 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:15,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:15,717 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1504096149, now seen corresponding path program 42 times [2021-07-13 19:17:15,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:15,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748284719] [2021-07-13 19:17:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:15,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:15,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748284719] [2021-07-13 19:17:15,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748284719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720914165] [2021-07-13 19:17:15,766 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:15,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:15,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:17:15,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:15,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:15,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:17:16,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:16,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:16,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:16,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:17:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:16,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720914165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:16,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:17:16,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714937973] [2021-07-13 19:17:16,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:16,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:16,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:16,170 INFO L87 Difference]: Start difference. First operand 497 states and 1433 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:16,318 INFO L93 Difference]: Finished difference Result 574 states and 1592 transitions. [2021-07-13 19:17:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:16,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:17:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:16,323 INFO L225 Difference]: With dead ends: 574 [2021-07-13 19:17:16,323 INFO L226 Difference]: Without dead ends: 571 [2021-07-13 19:17:16,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-13 19:17:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 529. [2021-07-13 19:17:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9015151515151514) internal successors, (1532), 528 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1532 transitions. [2021-07-13 19:17:16,334 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1532 transitions. Word has length 17 [2021-07-13 19:17:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:16,334 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1532 transitions. [2021-07-13 19:17:16,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1532 transitions. [2021-07-13 19:17:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:16,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:16,336 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:16,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:16,549 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1577117358, now seen corresponding path program 43 times [2021-07-13 19:17:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:16,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601495047] [2021-07-13 19:17:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:16,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:16,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601495047] [2021-07-13 19:17:16,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601495047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373426442] [2021-07-13 19:17:16,609 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:16,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:16,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373426442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:16,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:16,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472458532] [2021-07-13 19:17:16,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:16,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:16,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:16,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:16,678 INFO L87 Difference]: Start difference. First operand 529 states and 1532 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:16,875 INFO L93 Difference]: Finished difference Result 696 states and 1799 transitions. [2021-07-13 19:17:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:17:16,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:16,880 INFO L225 Difference]: With dead ends: 696 [2021-07-13 19:17:16,880 INFO L226 Difference]: Without dead ends: 689 [2021-07-13 19:17:16,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:17:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-07-13 19:17:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 549. [2021-07-13 19:17:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.906934306569343) internal successors, (1593), 548 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1593 transitions. [2021-07-13 19:17:16,892 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1593 transitions. Word has length 18 [2021-07-13 19:17:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:16,892 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1593 transitions. [2021-07-13 19:17:16,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1593 transitions. [2021-07-13 19:17:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:16,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:16,894 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:17,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-07-13 19:17:17,116 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash 121393866, now seen corresponding path program 44 times [2021-07-13 19:17:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420372499] [2021-07-13 19:17:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:17,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:17,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420372499] [2021-07-13 19:17:17,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420372499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:17,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759257535] [2021-07-13 19:17:17,172 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:17,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:17,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:17,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:17,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759257535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:17,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:17,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:17,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344227763] [2021-07-13 19:17:17,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:17,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:17,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:17,253 INFO L87 Difference]: Start difference. First operand 549 states and 1593 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:17,300 INFO L93 Difference]: Finished difference Result 706 states and 1828 transitions. [2021-07-13 19:17:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:17,305 INFO L225 Difference]: With dead ends: 706 [2021-07-13 19:17:17,305 INFO L226 Difference]: Without dead ends: 706 [2021-07-13 19:17:17,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-07-13 19:17:17,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 525. [2021-07-13 19:17:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.8874045801526718) internal successors, (1513), 524 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1513 transitions. [2021-07-13 19:17:17,315 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1513 transitions. Word has length 18 [2021-07-13 19:17:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:17,316 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1513 transitions. [2021-07-13 19:17:17,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1513 transitions. [2021-07-13 19:17:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:17,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:17,317 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:17,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:17,530 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1437522508, now seen corresponding path program 45 times [2021-07-13 19:17:17,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:17,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597111234] [2021-07-13 19:17:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:17,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:17,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597111234] [2021-07-13 19:17:17,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597111234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:17,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805884570] [2021-07-13 19:17:17,583 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:17,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:17,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:17,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:17,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:17,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805884570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:17,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:17,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:17,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765337337] [2021-07-13 19:17:17,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:17,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:17,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:17,648 INFO L87 Difference]: Start difference. First operand 525 states and 1513 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:17,767 INFO L93 Difference]: Finished difference Result 683 states and 1762 transitions. [2021-07-13 19:17:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:17,770 INFO L225 Difference]: With dead ends: 683 [2021-07-13 19:17:17,770 INFO L226 Difference]: Without dead ends: 681 [2021-07-13 19:17:17,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-07-13 19:17:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 547. [2021-07-13 19:17:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8956043956043955) internal successors, (1581), 546 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1581 transitions. [2021-07-13 19:17:17,785 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1581 transitions. Word has length 18 [2021-07-13 19:17:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:17,785 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1581 transitions. [2021-07-13 19:17:17,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1581 transitions. [2021-07-13 19:17:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:17,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:17,786 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:18,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-13 19:17:18,010 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash 280226552, now seen corresponding path program 46 times [2021-07-13 19:17:18,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:18,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924838193] [2021-07-13 19:17:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:18,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:18,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924838193] [2021-07-13 19:17:18,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924838193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470045291] [2021-07-13 19:17:18,065 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:18,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:18,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:18,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:18,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:18,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470045291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:18,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304587862] [2021-07-13 19:17:18,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:18,136 INFO L87 Difference]: Start difference. First operand 547 states and 1581 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:18,192 INFO L93 Difference]: Finished difference Result 721 states and 1842 transitions. [2021-07-13 19:17:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:18,195 INFO L225 Difference]: With dead ends: 721 [2021-07-13 19:17:18,195 INFO L226 Difference]: Without dead ends: 721 [2021-07-13 19:17:18,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-13 19:17:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 548. [2021-07-13 19:17:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.895795246800731) internal successors, (1584), 547 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1584 transitions. [2021-07-13 19:17:18,211 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1584 transitions. Word has length 18 [2021-07-13 19:17:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:18,211 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1584 transitions. [2021-07-13 19:17:18,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1584 transitions. [2021-07-13 19:17:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:18,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:18,213 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:18,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-13 19:17:18,435 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:18,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1448820782, now seen corresponding path program 47 times [2021-07-13 19:17:18,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:18,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328526539] [2021-07-13 19:17:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:18,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328526539] [2021-07-13 19:17:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328526539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890554240] [2021-07-13 19:17:18,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:18,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:18,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890554240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:18,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:17:18,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072961346] [2021-07-13 19:17:18,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:18,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:18,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:18,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:18,572 INFO L87 Difference]: Start difference. First operand 548 states and 1584 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:18,643 INFO L93 Difference]: Finished difference Result 777 states and 1974 transitions. [2021-07-13 19:17:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:18,647 INFO L225 Difference]: With dead ends: 777 [2021-07-13 19:17:18,647 INFO L226 Difference]: Without dead ends: 777 [2021-07-13 19:17:18,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:18,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-07-13 19:17:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 523. [2021-07-13 19:17:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.875478927203065) internal successors, (1501), 522 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1501 transitions. [2021-07-13 19:17:18,659 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1501 transitions. Word has length 18 [2021-07-13 19:17:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:18,659 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1501 transitions. [2021-07-13 19:17:18,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1501 transitions. [2021-07-13 19:17:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:18,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:18,660 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:18,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-07-13 19:17:18,883 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash -808676538, now seen corresponding path program 48 times [2021-07-13 19:17:18,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:18,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677093254] [2021-07-13 19:17:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:18,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:18,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677093254] [2021-07-13 19:17:18,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677093254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509044232] [2021-07-13 19:17:18,949 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:18,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:18,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:18,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:19,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509044232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:19,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:19,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790879724] [2021-07-13 19:17:19,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:19,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:19,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:19,016 INFO L87 Difference]: Start difference. First operand 523 states and 1501 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:19,125 INFO L93 Difference]: Finished difference Result 678 states and 1749 transitions. [2021-07-13 19:17:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:19,127 INFO L225 Difference]: With dead ends: 678 [2021-07-13 19:17:19,127 INFO L226 Difference]: Without dead ends: 676 [2021-07-13 19:17:19,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-13 19:17:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 547. [2021-07-13 19:17:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-07-13 19:17:19,139 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-07-13 19:17:19,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:19,139 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-07-13 19:17:19,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-07-13 19:17:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:19,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:19,141 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:19,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-07-13 19:17:19,357 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash 909072522, now seen corresponding path program 49 times [2021-07-13 19:17:19,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:19,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257903814] [2021-07-13 19:17:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:19,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:19,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257903814] [2021-07-13 19:17:19,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257903814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593678026] [2021-07-13 19:17:19,406 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:19,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593678026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:19,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:19,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969008495] [2021-07-13 19:17:19,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:19,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:19,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:19,469 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:19,517 INFO L93 Difference]: Finished difference Result 708 states and 1807 transitions. [2021-07-13 19:17:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:19,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:19,520 INFO L225 Difference]: With dead ends: 708 [2021-07-13 19:17:19,520 INFO L226 Difference]: Without dead ends: 708 [2021-07-13 19:17:19,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:19,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-07-13 19:17:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 547. [2021-07-13 19:17:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-07-13 19:17:19,532 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-07-13 19:17:19,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:19,532 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-07-13 19:17:19,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-07-13 19:17:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:19,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:19,533 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:19,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:19,755 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:19,756 INFO L82 PathProgramCache]: Analyzing trace with hash -819974812, now seen corresponding path program 50 times [2021-07-13 19:17:19,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:19,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473881709] [2021-07-13 19:17:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:19,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:19,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473881709] [2021-07-13 19:17:19,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473881709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188296248] [2021-07-13 19:17:19,807 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:19,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:19,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:19,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:19,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188296248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:19,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:17:19,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194081163] [2021-07-13 19:17:19,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:19,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:19,882 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:19,957 INFO L93 Difference]: Finished difference Result 767 states and 1938 transitions. [2021-07-13 19:17:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:19,960 INFO L225 Difference]: With dead ends: 767 [2021-07-13 19:17:19,960 INFO L226 Difference]: Without dead ends: 767 [2021-07-13 19:17:19,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-07-13 19:17:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 520. [2021-07-13 19:17:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.859344894026975) internal successors, (1484), 519 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1484 transitions. [2021-07-13 19:17:19,970 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1484 transitions. Word has length 18 [2021-07-13 19:17:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:19,971 INFO L482 AbstractCegarLoop]: Abstraction has 520 states and 1484 transitions. [2021-07-13 19:17:19,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1484 transitions. [2021-07-13 19:17:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:19,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:19,972 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:20,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-07-13 19:17:20,194 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1414132682, now seen corresponding path program 51 times [2021-07-13 19:17:20,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:20,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148779983] [2021-07-13 19:17:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:20,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:20,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148779983] [2021-07-13 19:17:20,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148779983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:20,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237595534] [2021-07-13 19:17:20,247 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:20,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:20,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:20,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:20,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:20,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237595534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:20,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:20,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:17:20,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621799479] [2021-07-13 19:17:20,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:20,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:20,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:20,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:20,323 INFO L87 Difference]: Start difference. First operand 520 states and 1484 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:20,427 INFO L93 Difference]: Finished difference Result 976 states and 2581 transitions. [2021-07-13 19:17:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:17:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:20,432 INFO L225 Difference]: With dead ends: 976 [2021-07-13 19:17:20,432 INFO L226 Difference]: Without dead ends: 976 [2021-07-13 19:17:20,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-07-13 19:17:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 701. [2021-07-13 19:17:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.9371428571428573) internal successors, (2056), 700 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2056 transitions. [2021-07-13 19:17:20,450 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2056 transitions. Word has length 18 [2021-07-13 19:17:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:20,451 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2056 transitions. [2021-07-13 19:17:20,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2056 transitions. [2021-07-13 19:17:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:20,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:20,452 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:20,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:20,668 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:20,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1505679348, now seen corresponding path program 52 times [2021-07-13 19:17:20,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:20,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755787461] [2021-07-13 19:17:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:20,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:20,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755787461] [2021-07-13 19:17:20,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755787461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:20,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545300080] [2021-07-13 19:17:20,719 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:20,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:20,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:20,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:20,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:20,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545300080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:20,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:20,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:20,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296875336] [2021-07-13 19:17:20,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:20,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:20,796 INFO L87 Difference]: Start difference. First operand 701 states and 2056 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:20,894 INFO L93 Difference]: Finished difference Result 888 states and 2419 transitions. [2021-07-13 19:17:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:20,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:20,900 INFO L225 Difference]: With dead ends: 888 [2021-07-13 19:17:20,900 INFO L226 Difference]: Without dead ends: 886 [2021-07-13 19:17:20,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-07-13 19:17:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 764. [2021-07-13 19:17:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.9436435124508518) internal successors, (2246), 763 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2246 transitions. [2021-07-13 19:17:20,915 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2246 transitions. Word has length 18 [2021-07-13 19:17:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:20,915 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2246 transitions. [2021-07-13 19:17:20,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2246 transitions. [2021-07-13 19:17:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:20,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:20,917 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:21,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-07-13 19:17:21,139 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:21,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1071538888, now seen corresponding path program 53 times [2021-07-13 19:17:21,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:21,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611410573] [2021-07-13 19:17:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:21,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:21,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611410573] [2021-07-13 19:17:21,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611410573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:21,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244510348] [2021-07-13 19:17:21,187 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:21,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:21,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:21,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:21,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244510348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:21,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:21,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:21,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352144243] [2021-07-13 19:17:21,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:21,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:21,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:21,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:21,269 INFO L87 Difference]: Start difference. First operand 764 states and 2246 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:21,312 INFO L93 Difference]: Finished difference Result 882 states and 2384 transitions. [2021-07-13 19:17:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:21,315 INFO L225 Difference]: With dead ends: 882 [2021-07-13 19:17:21,316 INFO L226 Difference]: Without dead ends: 882 [2021-07-13 19:17:21,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-07-13 19:17:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 755. [2021-07-13 19:17:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2021-07-13 19:17:21,328 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 18 [2021-07-13 19:17:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:21,329 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2021-07-13 19:17:21,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2021-07-13 19:17:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:21,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:21,330 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:21,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-07-13 19:17:21,534 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:21,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1494381074, now seen corresponding path program 54 times [2021-07-13 19:17:21,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:21,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895839684] [2021-07-13 19:17:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:21,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:21,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895839684] [2021-07-13 19:17:21,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895839684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:21,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491268914] [2021-07-13 19:17:21,585 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:21,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:21,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:21,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491268914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:21,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:21,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:21,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129365355] [2021-07-13 19:17:21,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:21,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:21,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:21,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:21,656 INFO L87 Difference]: Start difference. First operand 755 states and 2211 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:21,734 INFO L93 Difference]: Finished difference Result 936 states and 2510 transitions. [2021-07-13 19:17:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:21,737 INFO L225 Difference]: With dead ends: 936 [2021-07-13 19:17:21,737 INFO L226 Difference]: Without dead ends: 936 [2021-07-13 19:17:21,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-07-13 19:17:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 710. [2021-07-13 19:17:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.913963328631876) internal successors, (2066), 709 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2066 transitions. [2021-07-13 19:17:21,758 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2066 transitions. Word has length 18 [2021-07-13 19:17:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:21,758 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2066 transitions. [2021-07-13 19:17:21,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2066 transitions. [2021-07-13 19:17:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:21,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:21,759 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:21,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:21,977 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash -566478728, now seen corresponding path program 55 times [2021-07-13 19:17:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:21,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686604221] [2021-07-13 19:17:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:22,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:22,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686604221] [2021-07-13 19:17:22,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686604221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632384677] [2021-07-13 19:17:22,025 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:22,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:22,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632384677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:22,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:22,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802164913] [2021-07-13 19:17:22,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:22,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:22,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:22,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:22,097 INFO L87 Difference]: Start difference. First operand 710 states and 2066 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:22,174 INFO L93 Difference]: Finished difference Result 1110 states and 3081 transitions. [2021-07-13 19:17:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:22,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:22,177 INFO L225 Difference]: With dead ends: 1110 [2021-07-13 19:17:22,178 INFO L226 Difference]: Without dead ends: 1110 [2021-07-13 19:17:22,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-13 19:17:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 950. [2021-07-13 19:17:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.9736564805057957) internal successors, (2822), 949 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2822 transitions. [2021-07-13 19:17:22,192 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2822 transitions. Word has length 18 [2021-07-13 19:17:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:22,192 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 2822 transitions. [2021-07-13 19:17:22,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2822 transitions. [2021-07-13 19:17:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:22,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:22,194 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:22,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-13 19:17:22,405 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:22,405 INFO L82 PathProgramCache]: Analyzing trace with hash -28623150, now seen corresponding path program 56 times [2021-07-13 19:17:22,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:22,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594985969] [2021-07-13 19:17:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:22,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:22,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594985969] [2021-07-13 19:17:22,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594985969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601071495] [2021-07-13 19:17:22,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:22,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:22,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:22,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:22,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601071495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:22,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:22,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102186370] [2021-07-13 19:17:22,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:22,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:22,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:22,533 INFO L87 Difference]: Start difference. First operand 950 states and 2822 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:22,668 INFO L93 Difference]: Finished difference Result 1384 states and 3920 transitions. [2021-07-13 19:17:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:22,671 INFO L225 Difference]: With dead ends: 1384 [2021-07-13 19:17:22,671 INFO L226 Difference]: Without dead ends: 1384 [2021-07-13 19:17:22,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-07-13 19:17:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1190. [2021-07-13 19:17:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.015138772077376) internal successors, (3585), 1189 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3585 transitions. [2021-07-13 19:17:22,687 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3585 transitions. Word has length 18 [2021-07-13 19:17:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:22,687 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3585 transitions. [2021-07-13 19:17:22,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3585 transitions. [2021-07-13 19:17:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:22,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:22,688 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:22,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:22,889 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:22,889 INFO L82 PathProgramCache]: Analyzing trace with hash -928129974, now seen corresponding path program 57 times [2021-07-13 19:17:22,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:22,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980728129] [2021-07-13 19:17:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:22,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:22,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980728129] [2021-07-13 19:17:22,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980728129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772625824] [2021-07-13 19:17:22,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:22,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:22,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:22,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:22,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:22,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772625824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:22,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:17:22,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109579267] [2021-07-13 19:17:22,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:22,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:22,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:22,998 INFO L87 Difference]: Start difference. First operand 1190 states and 3585 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:23,123 INFO L93 Difference]: Finished difference Result 1540 states and 4536 transitions. [2021-07-13 19:17:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:23,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:23,126 INFO L225 Difference]: With dead ends: 1540 [2021-07-13 19:17:23,126 INFO L226 Difference]: Without dead ends: 1536 [2021-07-13 19:17:23,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:23,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-07-13 19:17:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1457. [2021-07-13 19:17:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.0494505494505493) internal successors, (4440), 1456 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4440 transitions. [2021-07-13 19:17:23,147 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4440 transitions. Word has length 18 [2021-07-13 19:17:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:23,147 INFO L482 AbstractCegarLoop]: Abstraction has 1457 states and 4440 transitions. [2021-07-13 19:17:23,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4440 transitions. [2021-07-13 19:17:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:23,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:23,149 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:23,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 19:17:23,350 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1482288330, now seen corresponding path program 58 times [2021-07-13 19:17:23,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:23,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831203934] [2021-07-13 19:17:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:23,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831203934] [2021-07-13 19:17:23,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831203934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461161381] [2021-07-13 19:17:23,403 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:23,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:23,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461161381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:23,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:23,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508453819] [2021-07-13 19:17:23,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:23,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:23,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:23,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:23,463 INFO L87 Difference]: Start difference. First operand 1457 states and 4440 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:23,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:23,566 INFO L93 Difference]: Finished difference Result 1886 states and 5530 transitions. [2021-07-13 19:17:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:23,569 INFO L225 Difference]: With dead ends: 1886 [2021-07-13 19:17:23,569 INFO L226 Difference]: Without dead ends: 1886 [2021-07-13 19:17:23,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-07-13 19:17:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1647. [2021-07-13 19:17:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.0674362089914946) internal successors, (5049), 1646 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5049 transitions. [2021-07-13 19:17:23,600 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5049 transitions. Word has length 18 [2021-07-13 19:17:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:23,600 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5049 transitions. [2021-07-13 19:17:23,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5049 transitions. [2021-07-13 19:17:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:23,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:23,602 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:23,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:23,825 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash 975942064, now seen corresponding path program 59 times [2021-07-13 19:17:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:23,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266262638] [2021-07-13 19:17:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:23,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266262638] [2021-07-13 19:17:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266262638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15355423] [2021-07-13 19:17:23,878 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:23,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:23,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15355423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:23,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459565733] [2021-07-13 19:17:23,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:23,947 INFO L87 Difference]: Start difference. First operand 1647 states and 5049 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:24,046 INFO L93 Difference]: Finished difference Result 2131 states and 6281 transitions. [2021-07-13 19:17:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:24,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:24,051 INFO L225 Difference]: With dead ends: 2131 [2021-07-13 19:17:24,051 INFO L226 Difference]: Without dead ends: 2131 [2021-07-13 19:17:24,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-07-13 19:17:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1134. [2021-07-13 19:17:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.0123565754633717) internal successors, (3413), 1133 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3413 transitions. [2021-07-13 19:17:24,076 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3413 transitions. Word has length 18 [2021-07-13 19:17:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:24,077 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3413 transitions. [2021-07-13 19:17:24,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3413 transitions. [2021-07-13 19:17:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:24,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:24,079 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:24,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-07-13 19:17:24,289 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1513797642, now seen corresponding path program 60 times [2021-07-13 19:17:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:24,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632302415] [2021-07-13 19:17:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:24,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:24,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632302415] [2021-07-13 19:17:24,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632302415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416696090] [2021-07-13 19:17:24,347 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:24,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:17:24,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:24,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:24,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416696090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:24,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562357054] [2021-07-13 19:17:24,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:24,416 INFO L87 Difference]: Start difference. First operand 1134 states and 3413 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:24,558 INFO L93 Difference]: Finished difference Result 1469 states and 4201 transitions. [2021-07-13 19:17:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:24,562 INFO L225 Difference]: With dead ends: 1469 [2021-07-13 19:17:24,562 INFO L226 Difference]: Without dead ends: 1469 [2021-07-13 19:17:24,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-07-13 19:17:24,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1145. [2021-07-13 19:17:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.015734265734266) internal successors, (3450), 1144 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3450 transitions. [2021-07-13 19:17:24,585 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3450 transitions. Word has length 18 [2021-07-13 19:17:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:24,585 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 3450 transitions. [2021-07-13 19:17:24,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3450 transitions. [2021-07-13 19:17:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:24,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:24,587 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:24,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:24,810 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:24,811 INFO L82 PathProgramCache]: Analyzing trace with hash 236267782, now seen corresponding path program 61 times [2021-07-13 19:17:24,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:24,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319986607] [2021-07-13 19:17:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:24,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:24,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319986607] [2021-07-13 19:17:24,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319986607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857246385] [2021-07-13 19:17:24,858 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:24,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:24,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857246385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:24,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:24,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144167729] [2021-07-13 19:17:24,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:24,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:24,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:24,932 INFO L87 Difference]: Start difference. First operand 1145 states and 3450 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:25,046 INFO L93 Difference]: Finished difference Result 1280 states and 3655 transitions. [2021-07-13 19:17:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:25,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:25,049 INFO L225 Difference]: With dead ends: 1280 [2021-07-13 19:17:25,050 INFO L226 Difference]: Without dead ends: 1276 [2021-07-13 19:17:25,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-13 19:17:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1116. [2021-07-13 19:17:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.0053811659192826) internal successors, (3351), 1115 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3351 transitions. [2021-07-13 19:17:25,069 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3351 transitions. Word has length 18 [2021-07-13 19:17:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:25,069 INFO L482 AbstractCegarLoop]: Abstraction has 1116 states and 3351 transitions. [2021-07-13 19:17:25,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3351 transitions. [2021-07-13 19:17:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:25,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:25,071 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:25,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-13 19:17:25,277 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1954016842, now seen corresponding path program 62 times [2021-07-13 19:17:25,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:25,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278979603] [2021-07-13 19:17:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:25,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:25,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278979603] [2021-07-13 19:17:25,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278979603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194207460] [2021-07-13 19:17:25,323 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:25,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:25,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:25,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194207460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:25,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724459813] [2021-07-13 19:17:25,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:25,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:25,388 INFO L87 Difference]: Start difference. First operand 1116 states and 3351 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:25,446 INFO L93 Difference]: Finished difference Result 1248 states and 3538 transitions. [2021-07-13 19:17:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:25,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:25,449 INFO L225 Difference]: With dead ends: 1248 [2021-07-13 19:17:25,449 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 19:17:25,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 19:17:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1114. [2021-07-13 19:17:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.0017969451931714) internal successors, (3341), 1113 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3341 transitions. [2021-07-13 19:17:25,467 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3341 transitions. Word has length 18 [2021-07-13 19:17:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:25,467 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3341 transitions. [2021-07-13 19:17:25,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3341 transitions. [2021-07-13 19:17:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:25,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:25,468 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:25,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:25,688 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash 224969508, now seen corresponding path program 63 times [2021-07-13 19:17:25,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:25,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273551732] [2021-07-13 19:17:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:25,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:25,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273551732] [2021-07-13 19:17:25,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273551732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362869808] [2021-07-13 19:17:25,735 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:25,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:25,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:25,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:25,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:25,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362869808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:25,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:17:25,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312774926] [2021-07-13 19:17:25,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:25,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:25,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:25,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:25,807 INFO L87 Difference]: Start difference. First operand 1114 states and 3341 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:25,870 INFO L93 Difference]: Finished difference Result 1212 states and 3446 transitions. [2021-07-13 19:17:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:25,873 INFO L225 Difference]: With dead ends: 1212 [2021-07-13 19:17:25,873 INFO L226 Difference]: Without dead ends: 1212 [2021-07-13 19:17:25,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-07-13 19:17:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1096. [2021-07-13 19:17:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.992694063926941) internal successors, (3277), 1095 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3277 transitions. [2021-07-13 19:17:25,890 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3277 transitions. Word has length 18 [2021-07-13 19:17:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:25,891 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3277 transitions. [2021-07-13 19:17:25,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3277 transitions. [2021-07-13 19:17:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:25,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:25,892 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:26,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:26,109 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1835890294, now seen corresponding path program 64 times [2021-07-13 19:17:26,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:26,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521751708] [2021-07-13 19:17:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:26,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:26,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521751708] [2021-07-13 19:17:26,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521751708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981329780] [2021-07-13 19:17:26,174 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:26,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:26,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:26,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:26,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981329780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:26,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:26,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525540329] [2021-07-13 19:17:26,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:26,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:26,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:26,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:26,247 INFO L87 Difference]: Start difference. First operand 1096 states and 3277 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:26,353 INFO L93 Difference]: Finished difference Result 1269 states and 3581 transitions. [2021-07-13 19:17:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:26,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:26,356 INFO L225 Difference]: With dead ends: 1269 [2021-07-13 19:17:26,356 INFO L226 Difference]: Without dead ends: 1269 [2021-07-13 19:17:26,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-07-13 19:17:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1069. [2021-07-13 19:17:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.985955056179775) internal successors, (3189), 1068 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3189 transitions. [2021-07-13 19:17:26,374 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3189 transitions. Word has length 18 [2021-07-13 19:17:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:26,374 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3189 transitions. [2021-07-13 19:17:26,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3189 transitions. [2021-07-13 19:17:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:26,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:26,376 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:26,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-07-13 19:17:26,589 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1298034716, now seen corresponding path program 65 times [2021-07-13 19:17:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:26,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24732145] [2021-07-13 19:17:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:26,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:26,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24732145] [2021-07-13 19:17:26,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24732145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047787593] [2021-07-13 19:17:26,640 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:26,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:26,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:26,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047787593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:26,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:26,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386932952] [2021-07-13 19:17:26,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:26,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:26,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:26,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:26,704 INFO L87 Difference]: Start difference. First operand 1069 states and 3189 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:26,831 INFO L93 Difference]: Finished difference Result 1385 states and 3940 transitions. [2021-07-13 19:17:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:26,835 INFO L225 Difference]: With dead ends: 1385 [2021-07-13 19:17:26,835 INFO L226 Difference]: Without dead ends: 1385 [2021-07-13 19:17:26,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-07-13 19:17:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1117. [2021-07-13 19:17:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9946236559139785) internal successors, (3342), 1116 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3342 transitions. [2021-07-13 19:17:26,854 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3342 transitions. Word has length 18 [2021-07-13 19:17:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:26,854 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3342 transitions. [2021-07-13 19:17:26,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3342 transitions. [2021-07-13 19:17:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:26,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:26,856 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:27,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-13 19:17:27,069 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1804380982, now seen corresponding path program 66 times [2021-07-13 19:17:27,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:27,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426644965] [2021-07-13 19:17:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:27,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:27,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426644965] [2021-07-13 19:17:27,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426644965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028683784] [2021-07-13 19:17:27,125 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:27,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:17:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:27,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028683784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:27,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:27,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961263499] [2021-07-13 19:17:27,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:27,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:27,190 INFO L87 Difference]: Start difference. First operand 1117 states and 3342 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:27,355 INFO L93 Difference]: Finished difference Result 1491 states and 4244 transitions. [2021-07-13 19:17:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:27,357 INFO L225 Difference]: With dead ends: 1491 [2021-07-13 19:17:27,358 INFO L226 Difference]: Without dead ends: 1491 [2021-07-13 19:17:27,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:17:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-07-13 19:17:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1299. [2021-07-13 19:17:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.010785824345146) internal successors, (3908), 1298 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3908 transitions. [2021-07-13 19:17:27,380 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3908 transitions. Word has length 18 [2021-07-13 19:17:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:27,381 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3908 transitions. [2021-07-13 19:17:27,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3908 transitions. [2021-07-13 19:17:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:27,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:27,383 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:27,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:27,604 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash -357725678, now seen corresponding path program 67 times [2021-07-13 19:17:27,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:27,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674242070] [2021-07-13 19:17:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:27,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:27,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674242070] [2021-07-13 19:17:27,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674242070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84984998] [2021-07-13 19:17:27,652 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84984998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:27,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:27,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896853781] [2021-07-13 19:17:27,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:27,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:27,713 INFO L87 Difference]: Start difference. First operand 1299 states and 3908 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:27,833 INFO L93 Difference]: Finished difference Result 1466 states and 4238 transitions. [2021-07-13 19:17:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:27,837 INFO L225 Difference]: With dead ends: 1466 [2021-07-13 19:17:27,837 INFO L226 Difference]: Without dead ends: 1462 [2021-07-13 19:17:27,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-07-13 19:17:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1236. [2021-07-13 19:17:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0) internal successors, (3705), 1235 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3705 transitions. [2021-07-13 19:17:27,859 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3705 transitions. Word has length 18 [2021-07-13 19:17:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:27,859 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 3705 transitions. [2021-07-13 19:17:27,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3705 transitions. [2021-07-13 19:17:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:27,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:27,861 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:28,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 19:17:28,077 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:28,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2084201938, now seen corresponding path program 68 times [2021-07-13 19:17:28,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:28,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877288411] [2021-07-13 19:17:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:28,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:28,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877288411] [2021-07-13 19:17:28,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877288411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434785826] [2021-07-13 19:17:28,134 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:28,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:28,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:28,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434785826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:28,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645417988] [2021-07-13 19:17:28,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:28,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:28,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:28,198 INFO L87 Difference]: Start difference. First operand 1236 states and 3705 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:28,333 INFO L93 Difference]: Finished difference Result 1717 states and 4942 transitions. [2021-07-13 19:17:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:28,337 INFO L225 Difference]: With dead ends: 1717 [2021-07-13 19:17:28,337 INFO L226 Difference]: Without dead ends: 1717 [2021-07-13 19:17:28,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-07-13 19:17:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1445. [2021-07-13 19:17:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.020083102493075) internal successors, (4361), 1444 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4361 transitions. [2021-07-13 19:17:28,361 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4361 transitions. Word has length 18 [2021-07-13 19:17:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:28,361 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 4361 transitions. [2021-07-13 19:17:28,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4361 transitions. [2021-07-13 19:17:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:28,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:28,363 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:28,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 19:17:28,585 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:28,585 INFO L82 PathProgramCache]: Analyzing trace with hash -727630420, now seen corresponding path program 69 times [2021-07-13 19:17:28,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:28,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427688257] [2021-07-13 19:17:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:28,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:28,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427688257] [2021-07-13 19:17:28,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427688257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132829179] [2021-07-13 19:17:28,640 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:28,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:28,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132829179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:28,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:28,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005143505] [2021-07-13 19:17:28,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:28,722 INFO L87 Difference]: Start difference. First operand 1445 states and 4361 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:28,847 INFO L93 Difference]: Finished difference Result 1815 states and 5279 transitions. [2021-07-13 19:17:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:17:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:28,850 INFO L225 Difference]: With dead ends: 1815 [2021-07-13 19:17:28,850 INFO L226 Difference]: Without dead ends: 1815 [2021-07-13 19:17:28,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-07-13 19:17:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1189. [2021-07-13 19:17:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.9974747474747474) internal successors, (3561), 1188 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3561 transitions. [2021-07-13 19:17:28,880 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3561 transitions. Word has length 18 [2021-07-13 19:17:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:28,880 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3561 transitions. [2021-07-13 19:17:28,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3561 transitions. [2021-07-13 19:17:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:28,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:28,882 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:29,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-07-13 19:17:29,097 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:29,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1233976686, now seen corresponding path program 70 times [2021-07-13 19:17:29,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:29,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727727228] [2021-07-13 19:17:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:29,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:29,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727727228] [2021-07-13 19:17:29,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727727228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:29,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451098205] [2021-07-13 19:17:29,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:29,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:29,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:29,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451098205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:29,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:29,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:29,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557914991] [2021-07-13 19:17:29,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:29,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:29,239 INFO L87 Difference]: Start difference. First operand 1189 states and 3561 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:29,444 INFO L93 Difference]: Finished difference Result 1539 states and 4366 transitions. [2021-07-13 19:17:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:29,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:29,448 INFO L225 Difference]: With dead ends: 1539 [2021-07-13 19:17:29,448 INFO L226 Difference]: Without dead ends: 1539 [2021-07-13 19:17:29,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:17:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-07-13 19:17:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1195. [2021-07-13 19:17:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.9983249581239533) internal successors, (3580), 1194 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3580 transitions. [2021-07-13 19:17:29,468 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3580 transitions. Word has length 18 [2021-07-13 19:17:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:29,468 INFO L482 AbstractCegarLoop]: Abstraction has 1195 states and 3580 transitions. [2021-07-13 19:17:29,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3580 transitions. [2021-07-13 19:17:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:29,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:29,470 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:29,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-07-13 19:17:29,685 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash -460785100, now seen corresponding path program 71 times [2021-07-13 19:17:29,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:29,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775469778] [2021-07-13 19:17:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:29,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:29,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775469778] [2021-07-13 19:17:29,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775469778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:29,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14940350] [2021-07-13 19:17:29,733 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:29,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:29,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:29,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:29,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14940350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:29,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:29,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:29,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958630006] [2021-07-13 19:17:29,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:29,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:29,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:29,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:29,793 INFO L87 Difference]: Start difference. First operand 1195 states and 3580 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:29,902 INFO L93 Difference]: Finished difference Result 1319 states and 3767 transitions. [2021-07-13 19:17:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:29,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:29,905 INFO L225 Difference]: With dead ends: 1319 [2021-07-13 19:17:29,905 INFO L226 Difference]: Without dead ends: 1315 [2021-07-13 19:17:29,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-07-13 19:17:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1219. [2021-07-13 19:17:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.0) internal successors, (3654), 1218 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3654 transitions. [2021-07-13 19:17:29,925 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3654 transitions. Word has length 18 [2021-07-13 19:17:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:29,925 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 3654 transitions. [2021-07-13 19:17:29,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3654 transitions. [2021-07-13 19:17:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:29,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:29,927 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:30,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-07-13 19:17:30,146 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1256963960, now seen corresponding path program 72 times [2021-07-13 19:17:30,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:30,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189962430] [2021-07-13 19:17:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:30,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:30,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189962430] [2021-07-13 19:17:30,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189962430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:30,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675908983] [2021-07-13 19:17:30,191 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:30,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:30,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675908983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:30,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:30,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:30,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131242721] [2021-07-13 19:17:30,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:30,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:30,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:30,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:30,263 INFO L87 Difference]: Start difference. First operand 1219 states and 3654 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:30,337 INFO L93 Difference]: Finished difference Result 1350 states and 3852 transitions. [2021-07-13 19:17:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:30,339 INFO L225 Difference]: With dead ends: 1350 [2021-07-13 19:17:30,339 INFO L226 Difference]: Without dead ends: 1350 [2021-07-13 19:17:30,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-13 19:17:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1220. [2021-07-13 19:17:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.0) internal successors, (3657), 1219 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3657 transitions. [2021-07-13 19:17:30,353 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3657 transitions. Word has length 18 [2021-07-13 19:17:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:30,353 INFO L482 AbstractCegarLoop]: Abstraction has 1220 states and 3657 transitions. [2021-07-13 19:17:30,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3657 transitions. [2021-07-13 19:17:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:30,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:30,355 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:30,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:30,555 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash -472083374, now seen corresponding path program 73 times [2021-07-13 19:17:30,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:30,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825147274] [2021-07-13 19:17:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:30,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:30,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825147274] [2021-07-13 19:17:30,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825147274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:30,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599356151] [2021-07-13 19:17:30,611 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:30,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599356151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:30,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:30,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:17:30,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003093768] [2021-07-13 19:17:30,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:30,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:30,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:30,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:30,672 INFO L87 Difference]: Start difference. First operand 1220 states and 3657 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:30,759 INFO L93 Difference]: Finished difference Result 1356 states and 3865 transitions. [2021-07-13 19:17:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:30,761 INFO L225 Difference]: With dead ends: 1356 [2021-07-13 19:17:30,761 INFO L226 Difference]: Without dead ends: 1356 [2021-07-13 19:17:30,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-07-13 19:17:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1215. [2021-07-13 19:17:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.9975288303130148) internal successors, (3639), 1214 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3639 transitions. [2021-07-13 19:17:30,774 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3639 transitions. Word has length 18 [2021-07-13 19:17:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:30,775 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3639 transitions. [2021-07-13 19:17:30,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3639 transitions. [2021-07-13 19:17:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:30,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:30,776 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:30,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:30,977 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:30,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1762024120, now seen corresponding path program 74 times [2021-07-13 19:17:30,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:30,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940575863] [2021-07-13 19:17:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:31,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940575863] [2021-07-13 19:17:31,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940575863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464949657] [2021-07-13 19:17:31,023 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:31,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:31,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:31,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:31,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464949657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:31,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:31,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:17:31,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956074537] [2021-07-13 19:17:31,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:31,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:31,096 INFO L87 Difference]: Start difference. First operand 1215 states and 3639 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:31,155 INFO L93 Difference]: Finished difference Result 1623 states and 4723 transitions. [2021-07-13 19:17:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:17:31,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:31,158 INFO L225 Difference]: With dead ends: 1623 [2021-07-13 19:17:31,158 INFO L226 Difference]: Without dead ends: 1623 [2021-07-13 19:17:31,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-07-13 19:17:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1529. [2021-07-13 19:17:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.017670157068063) internal successors, (4611), 1528 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4611 transitions. [2021-07-13 19:17:31,174 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4611 transitions. Word has length 18 [2021-07-13 19:17:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:31,174 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4611 transitions. [2021-07-13 19:17:31,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4611 transitions. [2021-07-13 19:17:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:31,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:31,176 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:31,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:31,377 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1995087598, now seen corresponding path program 75 times [2021-07-13 19:17:31,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:31,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039376574] [2021-07-13 19:17:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:31,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:31,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039376574] [2021-07-13 19:17:31,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039376574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:31,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875709107] [2021-07-13 19:17:31,434 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:31,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:31,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:31,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:31,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875709107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:31,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:31,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:31,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066226658] [2021-07-13 19:17:31,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:31,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:31,505 INFO L87 Difference]: Start difference. First operand 1529 states and 4611 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:31,623 INFO L93 Difference]: Finished difference Result 1693 states and 4893 transitions. [2021-07-13 19:17:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:31,626 INFO L225 Difference]: With dead ends: 1693 [2021-07-13 19:17:31,626 INFO L226 Difference]: Without dead ends: 1693 [2021-07-13 19:17:31,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-07-13 19:17:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1537. [2021-07-13 19:17:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.017578125) internal successors, (4635), 1536 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4635 transitions. [2021-07-13 19:17:31,648 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4635 transitions. Word has length 18 [2021-07-13 19:17:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:31,648 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 4635 transitions. [2021-07-13 19:17:31,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4635 transitions. [2021-07-13 19:17:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:31,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:31,650 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:31,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:31,850 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1793533432, now seen corresponding path program 76 times [2021-07-13 19:17:31,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:31,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040152205] [2021-07-13 19:17:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:31,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040152205] [2021-07-13 19:17:31,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040152205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:31,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641402572] [2021-07-13 19:17:31,909 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:31,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:31,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:31,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:31,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:31,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641402572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:31,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:31,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:31,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611421431] [2021-07-13 19:17:31,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:31,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:31,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:31,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:31,987 INFO L87 Difference]: Start difference. First operand 1537 states and 4635 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:32,119 INFO L93 Difference]: Finished difference Result 1777 states and 5185 transitions. [2021-07-13 19:17:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:17:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:32,122 INFO L225 Difference]: With dead ends: 1777 [2021-07-13 19:17:32,122 INFO L226 Difference]: Without dead ends: 1777 [2021-07-13 19:17:32,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-07-13 19:17:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1651. [2021-07-13 19:17:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.0187878787878786) internal successors, (4981), 1650 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4981 transitions. [2021-07-13 19:17:32,140 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4981 transitions. Word has length 18 [2021-07-13 19:17:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:32,140 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4981 transitions. [2021-07-13 19:17:32,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4981 transitions. [2021-07-13 19:17:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:32,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:32,141 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:32,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-07-13 19:17:32,342 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298926, now seen corresponding path program 77 times [2021-07-13 19:17:32,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:32,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840389317] [2021-07-13 19:17:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:32,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840389317] [2021-07-13 19:17:32,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840389317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783323928] [2021-07-13 19:17:32,402 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:32,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:32,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:32,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:32,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783323928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:32,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:32,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:32,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826953976] [2021-07-13 19:17:32,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:32,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:32,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:32,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:32,488 INFO L87 Difference]: Start difference. First operand 1651 states and 4981 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:32,689 INFO L93 Difference]: Finished difference Result 1973 states and 5717 transitions. [2021-07-13 19:17:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:17:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:32,691 INFO L225 Difference]: With dead ends: 1973 [2021-07-13 19:17:32,691 INFO L226 Difference]: Without dead ends: 1973 [2021-07-13 19:17:32,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:17:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-07-13 19:17:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1718. [2021-07-13 19:17:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.018054746651136) internal successors, (5182), 1717 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5182 transitions. [2021-07-13 19:17:32,724 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5182 transitions. Word has length 18 [2021-07-13 19:17:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:32,724 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5182 transitions. [2021-07-13 19:17:32,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5182 transitions. [2021-07-13 19:17:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:32,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:32,726 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:32,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-13 19:17:32,927 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:32,927 INFO L82 PathProgramCache]: Analyzing trace with hash 144938314, now seen corresponding path program 78 times [2021-07-13 19:17:32,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:32,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068479005] [2021-07-13 19:17:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:33,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:33,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068479005] [2021-07-13 19:17:33,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068479005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:33,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665851636] [2021-07-13 19:17:33,027 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:33,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:33,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:33,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:33,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:33,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665851636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:33,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:33,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-07-13 19:17:33,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136112167] [2021-07-13 19:17:33,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:33,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:33,096 INFO L87 Difference]: Start difference. First operand 1718 states and 5182 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:33,309 INFO L93 Difference]: Finished difference Result 1834 states and 5328 transitions. [2021-07-13 19:17:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:33,312 INFO L225 Difference]: With dead ends: 1834 [2021-07-13 19:17:33,312 INFO L226 Difference]: Without dead ends: 1830 [2021-07-13 19:17:33,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-07-13 19:17:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1663. [2021-07-13 19:17:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.0138387484957883) internal successors, (5009), 1662 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5009 transitions. [2021-07-13 19:17:33,335 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5009 transitions. Word has length 18 [2021-07-13 19:17:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:33,336 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5009 transitions. [2021-07-13 19:17:33,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5009 transitions. [2021-07-13 19:17:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:33,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:33,337 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:33,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:33,538 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash -731312694, now seen corresponding path program 79 times [2021-07-13 19:17:33,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:33,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080051233] [2021-07-13 19:17:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:33,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:33,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080051233] [2021-07-13 19:17:33,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080051233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:33,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128047665] [2021-07-13 19:17:33,604 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:33,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:33,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:33,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128047665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:33,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:33,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 19:17:33,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714397919] [2021-07-13 19:17:33,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:33,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:33,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:33,686 INFO L87 Difference]: Start difference. First operand 1663 states and 5009 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:33,997 INFO L93 Difference]: Finished difference Result 2513 states and 7307 transitions. [2021-07-13 19:17:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:17:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:34,000 INFO L225 Difference]: With dead ends: 2513 [2021-07-13 19:17:34,001 INFO L226 Difference]: Without dead ends: 2513 [2021-07-13 19:17:34,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:17:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-07-13 19:17:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1818. [2021-07-13 19:17:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.0181618051733627) internal successors, (5484), 1817 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5484 transitions. [2021-07-13 19:17:34,033 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5484 transitions. Word has length 18 [2021-07-13 19:17:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:34,033 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5484 transitions. [2021-07-13 19:17:34,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5484 transitions. [2021-07-13 19:17:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:34,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:34,035 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:34,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 19:17:34,236 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1998769872, now seen corresponding path program 80 times [2021-07-13 19:17:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505857392] [2021-07-13 19:17:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:34,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:34,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505857392] [2021-07-13 19:17:34,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505857392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:34,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040582902] [2021-07-13 19:17:34,295 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:34,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:34,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040582902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:34,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:34,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 19:17:34,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864189903] [2021-07-13 19:17:34,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:34,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:34,365 INFO L87 Difference]: Start difference. First operand 1818 states and 5484 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:34,601 INFO L93 Difference]: Finished difference Result 2122 states and 6163 transitions. [2021-07-13 19:17:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:17:34,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:34,604 INFO L225 Difference]: With dead ends: 2122 [2021-07-13 19:17:34,604 INFO L226 Difference]: Without dead ends: 2122 [2021-07-13 19:17:34,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:17:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-07-13 19:17:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1809. [2021-07-13 19:17:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.019358407079646) internal successors, (5459), 1808 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 5459 transitions. [2021-07-13 19:17:34,626 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 5459 transitions. Word has length 18 [2021-07-13 19:17:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:34,626 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 5459 transitions. [2021-07-13 19:17:34,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 5459 transitions. [2021-07-13 19:17:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:34,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:34,629 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:34,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:34,829 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:34,830 INFO L82 PathProgramCache]: Analyzing trace with hash -515634934, now seen corresponding path program 81 times [2021-07-13 19:17:34,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:34,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641766696] [2021-07-13 19:17:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:34,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:34,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641766696] [2021-07-13 19:17:34,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641766696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:34,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7250868] [2021-07-13 19:17:34,895 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:34,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:34,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:34,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7250868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:34,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:34,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 19:17:34,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240087791] [2021-07-13 19:17:34,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:34,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:34,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:34,979 INFO L87 Difference]: Start difference. First operand 1809 states and 5459 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:35,230 INFO L93 Difference]: Finished difference Result 2135 states and 6194 transitions. [2021-07-13 19:17:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:17:35,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:35,233 INFO L225 Difference]: With dead ends: 2135 [2021-07-13 19:17:35,233 INFO L226 Difference]: Without dead ends: 2135 [2021-07-13 19:17:35,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:17:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-07-13 19:17:35,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1814. [2021-07-13 19:17:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.0193050193050195) internal successors, (5474), 1813 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5474 transitions. [2021-07-13 19:17:35,257 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5474 transitions. Word has length 18 [2021-07-13 19:17:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:35,257 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5474 transitions. [2021-07-13 19:17:35,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5474 transitions. [2021-07-13 19:17:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:35,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:35,259 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:35,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-07-13 19:17:35,460 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash -594587962, now seen corresponding path program 82 times [2021-07-13 19:17:35,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:35,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086324997] [2021-07-13 19:17:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:35,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:35,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086324997] [2021-07-13 19:17:35,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086324997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:35,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005943169] [2021-07-13 19:17:35,524 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:35,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:35,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:35,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:35,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005943169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:35,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:35,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-07-13 19:17:35,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671900082] [2021-07-13 19:17:35,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:35,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:35,582 INFO L87 Difference]: Start difference. First operand 1814 states and 5474 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:35,709 INFO L93 Difference]: Finished difference Result 2025 states and 5942 transitions. [2021-07-13 19:17:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:35,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:35,713 INFO L225 Difference]: With dead ends: 2025 [2021-07-13 19:17:35,713 INFO L226 Difference]: Without dead ends: 2023 [2021-07-13 19:17:35,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-07-13 19:17:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1929. [2021-07-13 19:17:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.0264522821576763) internal successors, (5835), 1928 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 5835 transitions. [2021-07-13 19:17:35,736 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 5835 transitions. Word has length 18 [2021-07-13 19:17:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:35,736 INFO L482 AbstractCegarLoop]: Abstraction has 1929 states and 5835 transitions. [2021-07-13 19:17:35,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 5835 transitions. [2021-07-13 19:17:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:35,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:35,739 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:35,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-07-13 19:17:35,939 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1123161098, now seen corresponding path program 83 times [2021-07-13 19:17:35,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:35,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992717422] [2021-07-13 19:17:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:36,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992717422] [2021-07-13 19:17:36,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992717422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805806603] [2021-07-13 19:17:36,011 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:36,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:17:36,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:36,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:36,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805806603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:36,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:36,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-07-13 19:17:36,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105795854] [2021-07-13 19:17:36,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:36,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:36,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:36,087 INFO L87 Difference]: Start difference. First operand 1929 states and 5835 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:36,209 INFO L93 Difference]: Finished difference Result 2077 states and 6079 transitions. [2021-07-13 19:17:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:36,212 INFO L225 Difference]: With dead ends: 2077 [2021-07-13 19:17:36,212 INFO L226 Difference]: Without dead ends: 2077 [2021-07-13 19:17:36,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-07-13 19:17:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1931. [2021-07-13 19:17:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.0264248704663212) internal successors, (5841), 1930 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5841 transitions. [2021-07-13 19:17:36,235 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5841 transitions. Word has length 18 [2021-07-13 19:17:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:36,235 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5841 transitions. [2021-07-13 19:17:36,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5841 transitions. [2021-07-13 19:17:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:36,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:36,237 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:36,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-07-13 19:17:36,438 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash -605886236, now seen corresponding path program 84 times [2021-07-13 19:17:36,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:36,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567253707] [2021-07-13 19:17:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:36,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567253707] [2021-07-13 19:17:36,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567253707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207389897] [2021-07-13 19:17:36,499 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:36,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:36,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:36,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207389897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:36,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:36,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-07-13 19:17:36,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202500110] [2021-07-13 19:17:36,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:36,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:36,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:36,584 INFO L87 Difference]: Start difference. First operand 1931 states and 5841 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:36,736 INFO L93 Difference]: Finished difference Result 2122 states and 6197 transitions. [2021-07-13 19:17:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:36,739 INFO L225 Difference]: With dead ends: 2122 [2021-07-13 19:17:36,739 INFO L226 Difference]: Without dead ends: 2122 [2021-07-13 19:17:36,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-07-13 19:17:36,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1939. [2021-07-13 19:17:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.026315789473684) internal successors, (5865), 1938 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5865 transitions. [2021-07-13 19:17:36,761 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5865 transitions. Word has length 18 [2021-07-13 19:17:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:36,761 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5865 transitions. [2021-07-13 19:17:36,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5865 transitions. [2021-07-13 19:17:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:36,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:36,763 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:36,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:36,964 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1628221258, now seen corresponding path program 85 times [2021-07-13 19:17:36,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:36,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187312137] [2021-07-13 19:17:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:37,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:37,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187312137] [2021-07-13 19:17:37,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187312137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:37,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406318793] [2021-07-13 19:17:37,031 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:37,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:37,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406318793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:37,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:37,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-07-13 19:17:37,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728452799] [2021-07-13 19:17:37,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:37,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:37,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:37,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:37,114 INFO L87 Difference]: Start difference. First operand 1939 states and 5865 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:37,281 INFO L93 Difference]: Finished difference Result 2505 states and 7377 transitions. [2021-07-13 19:17:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:37,284 INFO L225 Difference]: With dead ends: 2505 [2021-07-13 19:17:37,284 INFO L226 Difference]: Without dead ends: 2505 [2021-07-13 19:17:37,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-07-13 19:17:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2323. [2021-07-13 19:17:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.0353143841515933) internal successors, (7048), 2322 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7048 transitions. [2021-07-13 19:17:37,323 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7048 transitions. Word has length 18 [2021-07-13 19:17:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:37,323 INFO L482 AbstractCegarLoop]: Abstraction has 2323 states and 7048 transitions. [2021-07-13 19:17:37,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7048 transitions. [2021-07-13 19:17:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:37,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:37,326 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:37,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:37,529 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2128890460, now seen corresponding path program 86 times [2021-07-13 19:17:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:37,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200367543] [2021-07-13 19:17:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:37,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:37,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200367543] [2021-07-13 19:17:37,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200367543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:37,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853696165] [2021-07-13 19:17:37,599 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:37,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:37,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:37,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:37,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853696165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:37,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:37,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-07-13 19:17:37,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675198943] [2021-07-13 19:17:37,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:37,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:37,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:37,695 INFO L87 Difference]: Start difference. First operand 2323 states and 7048 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:37,879 INFO L93 Difference]: Finished difference Result 2489 states and 7427 transitions. [2021-07-13 19:17:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:37,883 INFO L225 Difference]: With dead ends: 2489 [2021-07-13 19:17:37,883 INFO L226 Difference]: Without dead ends: 2489 [2021-07-13 19:17:37,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-07-13 19:17:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2409. [2021-07-13 19:17:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 3.034468438538206) internal successors, (7307), 2408 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 7307 transitions. [2021-07-13 19:17:37,930 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 7307 transitions. Word has length 18 [2021-07-13 19:17:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:37,930 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 7307 transitions. [2021-07-13 19:17:37,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 7307 transitions. [2021-07-13 19:17:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:37,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:37,934 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:38,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:38,156 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1659730570, now seen corresponding path program 87 times [2021-07-13 19:17:38,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:38,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610927295] [2021-07-13 19:17:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:38,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:38,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610927295] [2021-07-13 19:17:38,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610927295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:38,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333225012] [2021-07-13 19:17:38,225 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:38,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:38,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:38,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333225012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:38,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:38,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-13 19:17:38,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417124029] [2021-07-13 19:17:38,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:38,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:38,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:38,311 INFO L87 Difference]: Start difference. First operand 2409 states and 7307 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:38,528 INFO L93 Difference]: Finished difference Result 2555 states and 7581 transitions. [2021-07-13 19:17:38,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:38,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:38,532 INFO L225 Difference]: With dead ends: 2555 [2021-07-13 19:17:38,532 INFO L226 Difference]: Without dead ends: 2555 [2021-07-13 19:17:38,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:17:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-07-13 19:17:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2408. [2021-07-13 19:17:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.0344827586206895) internal successors, (7304), 2407 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7304 transitions. [2021-07-13 19:17:38,564 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7304 transitions. Word has length 18 [2021-07-13 19:17:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:38,564 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 7304 transitions. [2021-07-13 19:17:38,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7304 transitions. [2021-07-13 19:17:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:38,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:38,567 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:38,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:38,767 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:38,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1152101788, now seen corresponding path program 88 times [2021-07-13 19:17:38,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:38,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303150677] [2021-07-13 19:17:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:38,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:38,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303150677] [2021-07-13 19:17:38,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303150677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:38,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375075638] [2021-07-13 19:17:38,841 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:38,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:38,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:38,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:38,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375075638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:38,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:38,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-13 19:17:38,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796616092] [2021-07-13 19:17:38,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:38,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:38,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:38,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:38,930 INFO L87 Difference]: Start difference. First operand 2408 states and 7304 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:39,138 INFO L93 Difference]: Finished difference Result 2601 states and 7724 transitions. [2021-07-13 19:17:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:39,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:39,143 INFO L225 Difference]: With dead ends: 2601 [2021-07-13 19:17:39,143 INFO L226 Difference]: Without dead ends: 2601 [2021-07-13 19:17:39,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:17:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-07-13 19:17:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2436. [2021-07-13 19:17:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.0340862422997947) internal successors, (7388), 2435 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 7388 transitions. [2021-07-13 19:17:39,183 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 7388 transitions. Word has length 18 [2021-07-13 19:17:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:39,183 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 7388 transitions. [2021-07-13 19:17:39,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 7388 transitions. [2021-07-13 19:17:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:17:39,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:39,186 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:39,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:39,388 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1875408330, now seen corresponding path program 89 times [2021-07-13 19:17:39,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:39,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832508708] [2021-07-13 19:17:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:39,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832508708] [2021-07-13 19:17:39,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832508708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817211996] [2021-07-13 19:17:39,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:39,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:39,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:39,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817211996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:39,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:39,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-13 19:17:39,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097070242] [2021-07-13 19:17:39,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:39,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:39,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:39,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:39,564 INFO L87 Difference]: Start difference. First operand 2436 states and 7388 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:39,832 INFO L93 Difference]: Finished difference Result 2926 states and 8621 transitions. [2021-07-13 19:17:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:17:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:17:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:39,836 INFO L225 Difference]: With dead ends: 2926 [2021-07-13 19:17:39,836 INFO L226 Difference]: Without dead ends: 2926 [2021-07-13 19:17:39,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:17:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-07-13 19:17:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2460. [2021-07-13 19:17:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 3.0337535583570556) internal successors, (7460), 2459 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7460 transitions. [2021-07-13 19:17:39,865 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7460 transitions. Word has length 18 [2021-07-13 19:17:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:39,865 INFO L482 AbstractCegarLoop]: Abstraction has 2460 states and 7460 transitions. [2021-07-13 19:17:39,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7460 transitions. [2021-07-13 19:17:39,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:39,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:39,868 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:40,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-13 19:17:40,068 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash -892568151, now seen corresponding path program 90 times [2021-07-13 19:17:40,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:40,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322488799] [2021-07-13 19:17:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:40,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322488799] [2021-07-13 19:17:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322488799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708626985] [2021-07-13 19:17:40,162 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:40,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:40,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:40,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:40,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708626985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:40,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:40,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-07-13 19:17:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664982875] [2021-07-13 19:17:40,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:17:40,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:17:40,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:40,248 INFO L87 Difference]: Start difference. First operand 2460 states and 7460 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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) [2021-07-13 19:17:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:40,425 INFO L93 Difference]: Finished difference Result 2653 states and 7746 transitions. [2021-07-13 19:17:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:17:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 20 [2021-07-13 19:17:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:40,430 INFO L225 Difference]: With dead ends: 2653 [2021-07-13 19:17:40,430 INFO L226 Difference]: Without dead ends: 2647 [2021-07-13 19:17:40,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:17:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-07-13 19:17:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2452. [2021-07-13 19:17:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.025703794369645) internal successors, (7416), 2451 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7416 transitions. [2021-07-13 19:17:40,478 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7416 transitions. Word has length 20 [2021-07-13 19:17:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:40,478 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7416 transitions. [2021-07-13 19:17:40,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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) [2021-07-13 19:17:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7416 transitions. [2021-07-13 19:17:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:40,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:40,481 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:40,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-07-13 19:17:40,704 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1250996055, now seen corresponding path program 91 times [2021-07-13 19:17:40,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:40,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776487215] [2021-07-13 19:17:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:40,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:40,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776487215] [2021-07-13 19:17:40,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776487215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:40,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121665041] [2021-07-13 19:17:40,773 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:40,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121665041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:40,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:40,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-07-13 19:17:40,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134433837] [2021-07-13 19:17:40,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:40,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:40,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:40,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:40,828 INFO L87 Difference]: Start difference. First operand 2452 states and 7416 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:40,931 INFO L93 Difference]: Finished difference Result 2499 states and 7508 transitions. [2021-07-13 19:17:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:40,934 INFO L225 Difference]: With dead ends: 2499 [2021-07-13 19:17:40,934 INFO L226 Difference]: Without dead ends: 2498 [2021-07-13 19:17:40,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-07-13 19:17:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2452. [2021-07-13 19:17:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.0244798041615666) internal successors, (7413), 2451 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7413 transitions. [2021-07-13 19:17:40,961 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7413 transitions. Word has length 20 [2021-07-13 19:17:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:40,961 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7413 transitions. [2021-07-13 19:17:40,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7413 transitions. [2021-07-13 19:17:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:40,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:40,964 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:41,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:41,165 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:41,165 INFO L82 PathProgramCache]: Analyzing trace with hash 412854133, now seen corresponding path program 92 times [2021-07-13 19:17:41,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:41,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336567726] [2021-07-13 19:17:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:41,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:41,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336567726] [2021-07-13 19:17:41,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336567726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:41,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140168369] [2021-07-13 19:17:41,211 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:41,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:41,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:17:41,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140168369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:41,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:41,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:17:41,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916270732] [2021-07-13 19:17:41,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:41,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:41,271 INFO L87 Difference]: Start difference. First operand 2452 states and 7413 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:41,355 INFO L93 Difference]: Finished difference Result 2670 states and 7781 transitions. [2021-07-13 19:17:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:41,359 INFO L225 Difference]: With dead ends: 2670 [2021-07-13 19:17:41,359 INFO L226 Difference]: Without dead ends: 2670 [2021-07-13 19:17:41,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-07-13 19:17:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2472. [2021-07-13 19:17:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.0145690004046943) internal successors, (7449), 2471 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7449 transitions. [2021-07-13 19:17:41,405 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7449 transitions. Word has length 20 [2021-07-13 19:17:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:41,406 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7449 transitions. [2021-07-13 19:17:41,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7449 transitions. [2021-07-13 19:17:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:41,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:41,408 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:41,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-13 19:17:41,609 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1063359831, now seen corresponding path program 93 times [2021-07-13 19:17:41,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:41,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881958976] [2021-07-13 19:17:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:41,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:41,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881958976] [2021-07-13 19:17:41,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881958976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:41,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001695390] [2021-07-13 19:17:41,667 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:41,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:17:41,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:41,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:41,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001695390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:41,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:41,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:17:41,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655536780] [2021-07-13 19:17:41,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:41,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:41,742 INFO L87 Difference]: Start difference. First operand 2472 states and 7449 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:41,873 INFO L93 Difference]: Finished difference Result 2616 states and 7646 transitions. [2021-07-13 19:17:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:41,876 INFO L225 Difference]: With dead ends: 2616 [2021-07-13 19:17:41,876 INFO L226 Difference]: Without dead ends: 2608 [2021-07-13 19:17:41,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-13 19:17:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2441. [2021-07-13 19:17:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.018032786885246) internal successors, (7364), 2440 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7364 transitions. [2021-07-13 19:17:41,903 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7364 transitions. Word has length 20 [2021-07-13 19:17:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:41,903 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7364 transitions. [2021-07-13 19:17:41,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7364 transitions. [2021-07-13 19:17:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:41,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:41,905 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:42,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:42,106 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash -9725549, now seen corresponding path program 94 times [2021-07-13 19:17:42,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:42,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016681541] [2021-07-13 19:17:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:42,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:42,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016681541] [2021-07-13 19:17:42,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016681541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:42,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221073226] [2021-07-13 19:17:42,174 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:42,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:42,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:42,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221073226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:42,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:42,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-13 19:17:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132698484] [2021-07-13 19:17:42,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:42,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:42,241 INFO L87 Difference]: Start difference. First operand 2441 states and 7364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:42,390 INFO L93 Difference]: Finished difference Result 2536 states and 7516 transitions. [2021-07-13 19:17:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:42,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:42,394 INFO L225 Difference]: With dead ends: 2536 [2021-07-13 19:17:42,394 INFO L226 Difference]: Without dead ends: 2531 [2021-07-13 19:17:42,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-07-13 19:17:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2441. [2021-07-13 19:17:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.015573770491803) internal successors, (7358), 2440 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7358 transitions. [2021-07-13 19:17:42,435 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7358 transitions. Word has length 20 [2021-07-13 19:17:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:42,435 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7358 transitions. [2021-07-13 19:17:42,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7358 transitions. [2021-07-13 19:17:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:42,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:42,438 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:42,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-07-13 19:17:42,638 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:42,639 INFO L82 PathProgramCache]: Analyzing trace with hash -856557433, now seen corresponding path program 95 times [2021-07-13 19:17:42,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:42,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725330768] [2021-07-13 19:17:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:42,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:42,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725330768] [2021-07-13 19:17:42,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725330768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:42,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492294305] [2021-07-13 19:17:42,680 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:42,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:17:42,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:42,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:17:42,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492294305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:42,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:42,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:17:42,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153720155] [2021-07-13 19:17:42,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:42,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:42,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:42,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:42,752 INFO L87 Difference]: Start difference. First operand 2441 states and 7358 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:42,835 INFO L93 Difference]: Finished difference Result 2646 states and 7683 transitions. [2021-07-13 19:17:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:42,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:42,838 INFO L225 Difference]: With dead ends: 2646 [2021-07-13 19:17:42,838 INFO L226 Difference]: Without dead ends: 2644 [2021-07-13 19:17:42,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-07-13 19:17:42,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2425. [2021-07-13 19:17:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.007838283828383) internal successors, (7291), 2424 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7291 transitions. [2021-07-13 19:17:42,865 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7291 transitions. Word has length 20 [2021-07-13 19:17:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:42,865 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7291 transitions. [2021-07-13 19:17:42,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7291 transitions. [2021-07-13 19:17:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:42,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:42,867 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:43,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:43,067 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash -206051735, now seen corresponding path program 96 times [2021-07-13 19:17:43,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:43,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767812415] [2021-07-13 19:17:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:43,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:43,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767812415] [2021-07-13 19:17:43,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767812415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:43,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103162224] [2021-07-13 19:17:43,132 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:43,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:17:43,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:43,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:43,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:43,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103162224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:43,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:43,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-07-13 19:17:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682533343] [2021-07-13 19:17:43,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:43,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:43,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:43,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:43,198 INFO L87 Difference]: Start difference. First operand 2425 states and 7291 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:43,349 INFO L93 Difference]: Finished difference Result 2573 states and 7502 transitions. [2021-07-13 19:17:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:43,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:43,354 INFO L225 Difference]: With dead ends: 2573 [2021-07-13 19:17:43,354 INFO L226 Difference]: Without dead ends: 2568 [2021-07-13 19:17:43,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-07-13 19:17:43,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2418. [2021-07-13 19:17:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.00330988829127) internal successors, (7259), 2417 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7259 transitions. [2021-07-13 19:17:43,392 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7259 transitions. Word has length 20 [2021-07-13 19:17:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:43,392 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7259 transitions. [2021-07-13 19:17:43,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7259 transitions. [2021-07-13 19:17:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:43,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:43,395 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:43,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:43,616 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1279137115, now seen corresponding path program 97 times [2021-07-13 19:17:43,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:43,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043140206] [2021-07-13 19:17:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:43,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:43,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043140206] [2021-07-13 19:17:43,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043140206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:43,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031931491] [2021-07-13 19:17:43,711 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:43,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:43,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031931491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:43,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:43,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-13 19:17:43,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611016776] [2021-07-13 19:17:43,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:43,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:43,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:43,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:43,782 INFO L87 Difference]: Start difference. First operand 2418 states and 7259 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:43,926 INFO L93 Difference]: Finished difference Result 2568 states and 7475 transitions. [2021-07-13 19:17:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:43,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:43,930 INFO L225 Difference]: With dead ends: 2568 [2021-07-13 19:17:43,930 INFO L226 Difference]: Without dead ends: 2563 [2021-07-13 19:17:43,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-07-13 19:17:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2418. [2021-07-13 19:17:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.9975175837815473) internal successors, (7245), 2417 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7245 transitions. [2021-07-13 19:17:43,968 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7245 transitions. Word has length 20 [2021-07-13 19:17:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:43,968 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7245 transitions. [2021-07-13 19:17:43,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7245 transitions. [2021-07-13 19:17:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:43,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:43,971 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:44,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:44,187 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:44,187 INFO L82 PathProgramCache]: Analyzing trace with hash -185045527, now seen corresponding path program 98 times [2021-07-13 19:17:44,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:44,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898841709] [2021-07-13 19:17:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:44,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898841709] [2021-07-13 19:17:44,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898841709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738927508] [2021-07-13 19:17:44,253 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:44,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:44,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738927508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:44,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:44,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-13 19:17:44,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879009365] [2021-07-13 19:17:44,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:44,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:44,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:44,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:44,314 INFO L87 Difference]: Start difference. First operand 2418 states and 7245 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:44,441 INFO L93 Difference]: Finished difference Result 2556 states and 7520 transitions. [2021-07-13 19:17:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:44,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:44,445 INFO L225 Difference]: With dead ends: 2556 [2021-07-13 19:17:44,445 INFO L226 Difference]: Without dead ends: 2553 [2021-07-13 19:17:44,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-07-13 19:17:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2418. [2021-07-13 19:17:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.99669011170873) internal successors, (7243), 2417 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7243 transitions. [2021-07-13 19:17:44,473 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7243 transitions. Word has length 20 [2021-07-13 19:17:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:44,473 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7243 transitions. [2021-07-13 19:17:44,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7243 transitions. [2021-07-13 19:17:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:44,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:44,475 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:44,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-07-13 19:17:44,676 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:44,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:44,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1553610315, now seen corresponding path program 99 times [2021-07-13 19:17:44,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:44,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521620602] [2021-07-13 19:17:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:44,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:44,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521620602] [2021-07-13 19:17:44,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521620602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:44,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048385275] [2021-07-13 19:17:44,738 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:44,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:17:44,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:44,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048385275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:44,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:44,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:44,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924827567] [2021-07-13 19:17:44,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:44,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:44,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:44,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:44,808 INFO L87 Difference]: Start difference. First operand 2418 states and 7243 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:44,867 INFO L93 Difference]: Finished difference Result 2583 states and 7523 transitions. [2021-07-13 19:17:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:44,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:44,870 INFO L225 Difference]: With dead ends: 2583 [2021-07-13 19:17:44,871 INFO L226 Difference]: Without dead ends: 2581 [2021-07-13 19:17:44,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-07-13 19:17:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2419. [2021-07-13 19:17:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.9971050454921424) internal successors, (7247), 2418 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 7247 transitions. [2021-07-13 19:17:44,902 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 7247 transitions. Word has length 20 [2021-07-13 19:17:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:44,903 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 7247 transitions. [2021-07-13 19:17:44,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 7247 transitions. [2021-07-13 19:17:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:44,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:44,905 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:45,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-07-13 19:17:45,105 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash 191844375, now seen corresponding path program 100 times [2021-07-13 19:17:45,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:45,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240632858] [2021-07-13 19:17:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:45,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240632858] [2021-07-13 19:17:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240632858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221006539] [2021-07-13 19:17:45,167 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:45,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:45,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:45,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221006539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:45,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:45,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:17:45,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300192726] [2021-07-13 19:17:45,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:45,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:45,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:45,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:45,240 INFO L87 Difference]: Start difference. First operand 2419 states and 7247 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:45,314 INFO L93 Difference]: Finished difference Result 2556 states and 7442 transitions. [2021-07-13 19:17:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:45,314 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:45,318 INFO L225 Difference]: With dead ends: 2556 [2021-07-13 19:17:45,318 INFO L226 Difference]: Without dead ends: 2556 [2021-07-13 19:17:45,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-07-13 19:17:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2398. [2021-07-13 19:17:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.994993742177722) internal successors, (7179), 2397 states have internal predecessors, (7179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7179 transitions. [2021-07-13 19:17:45,357 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7179 transitions. Word has length 20 [2021-07-13 19:17:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:45,357 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 7179 transitions. [2021-07-13 19:17:45,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7179 transitions. [2021-07-13 19:17:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:45,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:45,359 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:45,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-07-13 19:17:45,560 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1902457683, now seen corresponding path program 101 times [2021-07-13 19:17:45,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:45,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679506646] [2021-07-13 19:17:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:45,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:45,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679506646] [2021-07-13 19:17:45,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679506646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:45,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310735764] [2021-07-13 19:17:45,618 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:45,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:17:45,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:45,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:45,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:17:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310735764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:45,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:45,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-07-13 19:17:45,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117649552] [2021-07-13 19:17:45,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:45,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:45,690 INFO L87 Difference]: Start difference. First operand 2398 states and 7179 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:45,776 INFO L93 Difference]: Finished difference Result 2533 states and 7366 transitions. [2021-07-13 19:17:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:45,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:45,780 INFO L225 Difference]: With dead ends: 2533 [2021-07-13 19:17:45,780 INFO L226 Difference]: Without dead ends: 2533 [2021-07-13 19:17:45,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-07-13 19:17:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2021-07-13 19:17:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 2.990388633514417) internal successors, (7156), 2393 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 7156 transitions. [2021-07-13 19:17:45,817 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 7156 transitions. Word has length 20 [2021-07-13 19:17:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:45,817 INFO L482 AbstractCegarLoop]: Abstraction has 2394 states and 7156 transitions. [2021-07-13 19:17:45,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 7156 transitions. [2021-07-13 19:17:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:45,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:45,820 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:46,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-07-13 19:17:46,043 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash -903104617, now seen corresponding path program 102 times [2021-07-13 19:17:46,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:46,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578590039] [2021-07-13 19:17:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:46,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:46,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578590039] [2021-07-13 19:17:46,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578590039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:46,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126206872] [2021-07-13 19:17:46,120 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:46,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:46,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:17:46,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126206872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:46,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:46,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-07-13 19:17:46,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467713897] [2021-07-13 19:17:46,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:46,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:46,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:46,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:46,174 INFO L87 Difference]: Start difference. First operand 2394 states and 7156 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:46,289 INFO L93 Difference]: Finished difference Result 2537 states and 7365 transitions. [2021-07-13 19:17:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:46,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:46,293 INFO L225 Difference]: With dead ends: 2537 [2021-07-13 19:17:46,293 INFO L226 Difference]: Without dead ends: 2534 [2021-07-13 19:17:46,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-07-13 19:17:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2390. [2021-07-13 19:17:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9824194223524487) internal successors, (7125), 2389 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7125 transitions. [2021-07-13 19:17:46,323 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7125 transitions. Word has length 20 [2021-07-13 19:17:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:46,323 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7125 transitions. [2021-07-13 19:17:46,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7125 transitions. [2021-07-13 19:17:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:46,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:46,325 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:46,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-07-13 19:17:46,526 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:46,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1976189997, now seen corresponding path program 103 times [2021-07-13 19:17:46,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:46,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460384304] [2021-07-13 19:17:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:46,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:46,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460384304] [2021-07-13 19:17:46,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460384304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:46,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068530170] [2021-07-13 19:17:46,601 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:46,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:46,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:46,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068530170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:46,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:46,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-07-13 19:17:46,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349053563] [2021-07-13 19:17:46,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:46,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:46,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:46,655 INFO L87 Difference]: Start difference. First operand 2390 states and 7125 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:46,780 INFO L93 Difference]: Finished difference Result 2538 states and 7340 transitions. [2021-07-13 19:17:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:46,783 INFO L225 Difference]: With dead ends: 2538 [2021-07-13 19:17:46,783 INFO L226 Difference]: Without dead ends: 2533 [2021-07-13 19:17:46,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-07-13 19:17:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2390. [2021-07-13 19:17:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.973629133528673) internal successors, (7104), 2389 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7104 transitions. [2021-07-13 19:17:46,819 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7104 transitions. Word has length 20 [2021-07-13 19:17:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:46,819 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7104 transitions. [2021-07-13 19:17:46,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7104 transitions. [2021-07-13 19:17:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:46,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:46,822 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:47,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-13 19:17:47,037 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash -882098409, now seen corresponding path program 104 times [2021-07-13 19:17:47,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:47,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705322383] [2021-07-13 19:17:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:47,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705322383] [2021-07-13 19:17:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705322383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186567659] [2021-07-13 19:17:47,111 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:47,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:47,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:47,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:47,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186567659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:47,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:47,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-07-13 19:17:47,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098012877] [2021-07-13 19:17:47,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:47,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:47,170 INFO L87 Difference]: Start difference. First operand 2390 states and 7104 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:47,295 INFO L93 Difference]: Finished difference Result 2545 states and 7407 transitions. [2021-07-13 19:17:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:47,298 INFO L225 Difference]: With dead ends: 2545 [2021-07-13 19:17:47,298 INFO L226 Difference]: Without dead ends: 2542 [2021-07-13 19:17:47,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-07-13 19:17:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2390. [2021-07-13 19:17:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9732105483465885) internal successors, (7103), 2389 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7103 transitions. [2021-07-13 19:17:47,324 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7103 transitions. Word has length 20 [2021-07-13 19:17:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:47,324 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7103 transitions. [2021-07-13 19:17:47,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7103 transitions. [2021-07-13 19:17:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:47,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:47,326 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:47,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-13 19:17:47,531 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:47,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1324997549, now seen corresponding path program 105 times [2021-07-13 19:17:47,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:47,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627191711] [2021-07-13 19:17:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:47,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:47,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627191711] [2021-07-13 19:17:47,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627191711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:47,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099160929] [2021-07-13 19:17:47,600 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:47,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:17:47,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:47,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:47,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099160929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:47,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:47,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:17:47,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221359822] [2021-07-13 19:17:47,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:47,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:47,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:47,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:47,683 INFO L87 Difference]: Start difference. First operand 2390 states and 7103 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:47,819 INFO L93 Difference]: Finished difference Result 2536 states and 7394 transitions. [2021-07-13 19:17:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:47,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:47,823 INFO L225 Difference]: With dead ends: 2536 [2021-07-13 19:17:47,823 INFO L226 Difference]: Without dead ends: 2532 [2021-07-13 19:17:47,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-07-13 19:17:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2390. [2021-07-13 19:17:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.972791963164504) internal successors, (7102), 2389 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7102 transitions. [2021-07-13 19:17:47,848 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7102 transitions. Word has length 20 [2021-07-13 19:17:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:47,848 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7102 transitions. [2021-07-13 19:17:47,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7102 transitions. [2021-07-13 19:17:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:47,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:47,850 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:48,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:48,051 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:48,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash 774024681, now seen corresponding path program 106 times [2021-07-13 19:17:48,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:48,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873119118] [2021-07-13 19:17:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:48,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:48,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873119118] [2021-07-13 19:17:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873119118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:48,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651642493] [2021-07-13 19:17:48,108 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:48,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:48,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:48,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651642493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:48,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:48,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:48,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217292174] [2021-07-13 19:17:48,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:48,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:48,193 INFO L87 Difference]: Start difference. First operand 2390 states and 7102 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:48,297 INFO L93 Difference]: Finished difference Result 2507 states and 7304 transitions. [2021-07-13 19:17:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:48,301 INFO L225 Difference]: With dead ends: 2507 [2021-07-13 19:17:48,302 INFO L226 Difference]: Without dead ends: 2507 [2021-07-13 19:17:48,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-07-13 19:17:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2391. [2021-07-13 19:17:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9728033472803346) internal successors, (7105), 2390 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7105 transitions. [2021-07-13 19:17:48,339 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7105 transitions. Word has length 20 [2021-07-13 19:17:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:48,339 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7105 transitions. [2021-07-13 19:17:48,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7105 transitions. [2021-07-13 19:17:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:48,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:48,342 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:48,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:48,566 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 888022761, now seen corresponding path program 107 times [2021-07-13 19:17:48,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:48,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205149743] [2021-07-13 19:17:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:48,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:48,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205149743] [2021-07-13 19:17:48,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205149743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:48,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838963805] [2021-07-13 19:17:48,639 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:48,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:48,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:48,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:48,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:48,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838963805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:48,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:48,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:17:48,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922046069] [2021-07-13 19:17:48,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:48,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:48,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:48,720 INFO L87 Difference]: Start difference. First operand 2391 states and 7105 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:48,845 INFO L93 Difference]: Finished difference Result 2530 states and 7380 transitions. [2021-07-13 19:17:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:17:48,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:48,848 INFO L225 Difference]: With dead ends: 2530 [2021-07-13 19:17:48,848 INFO L226 Difference]: Without dead ends: 2527 [2021-07-13 19:17:48,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-07-13 19:17:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2391. [2021-07-13 19:17:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.971548117154812) internal successors, (7102), 2390 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7102 transitions. [2021-07-13 19:17:48,873 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7102 transitions. Word has length 20 [2021-07-13 19:17:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:48,873 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7102 transitions. [2021-07-13 19:17:48,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7102 transitions. [2021-07-13 19:17:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:48,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:48,875 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:49,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:49,076 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:49,076 INFO L82 PathProgramCache]: Analyzing trace with hash -379434417, now seen corresponding path program 108 times [2021-07-13 19:17:49,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:49,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372030898] [2021-07-13 19:17:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:49,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:49,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372030898] [2021-07-13 19:17:49,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372030898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:49,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756753192] [2021-07-13 19:17:49,138 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:49,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:49,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:49,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:49,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:49,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756753192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:49,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:49,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-07-13 19:17:49,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081509773] [2021-07-13 19:17:49,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:49,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:49,192 INFO L87 Difference]: Start difference. First operand 2391 states and 7102 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:49,313 INFO L93 Difference]: Finished difference Result 2601 states and 7491 transitions. [2021-07-13 19:17:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:49,316 INFO L225 Difference]: With dead ends: 2601 [2021-07-13 19:17:49,317 INFO L226 Difference]: Without dead ends: 2598 [2021-07-13 19:17:49,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-07-13 19:17:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2391. [2021-07-13 19:17:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9673640167364015) internal successors, (7092), 2390 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7092 transitions. [2021-07-13 19:17:49,344 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7092 transitions. Word has length 20 [2021-07-13 19:17:49,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:49,344 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7092 transitions. [2021-07-13 19:17:49,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7092 transitions. [2021-07-13 19:17:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:49,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:49,346 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:49,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:49,547 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash -822333557, now seen corresponding path program 109 times [2021-07-13 19:17:49,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:49,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288827117] [2021-07-13 19:17:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:49,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:49,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288827117] [2021-07-13 19:17:49,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288827117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:49,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843368422] [2021-07-13 19:17:49,661 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:49,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:49,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843368422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:49,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:49,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-07-13 19:17:49,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459402543] [2021-07-13 19:17:49,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:49,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:49,730 INFO L87 Difference]: Start difference. First operand 2391 states and 7092 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:49,858 INFO L93 Difference]: Finished difference Result 2612 states and 7532 transitions. [2021-07-13 19:17:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:49,862 INFO L225 Difference]: With dead ends: 2612 [2021-07-13 19:17:49,862 INFO L226 Difference]: Without dead ends: 2604 [2021-07-13 19:17:49,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-07-13 19:17:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2396. [2021-07-13 19:17:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 2.9649269311064717) internal successors, (7101), 2395 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7101 transitions. [2021-07-13 19:17:49,898 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7101 transitions. Word has length 20 [2021-07-13 19:17:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:49,898 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7101 transitions. [2021-07-13 19:17:49,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7101 transitions. [2021-07-13 19:17:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:49,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:49,900 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:50,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-13 19:17:50,101 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1687413177, now seen corresponding path program 110 times [2021-07-13 19:17:50,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:50,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382508284] [2021-07-13 19:17:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:50,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:50,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382508284] [2021-07-13 19:17:50,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382508284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:50,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490363754] [2021-07-13 19:17:50,148 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:50,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:17:50,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490363754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:50,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:50,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:17:50,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860134678] [2021-07-13 19:17:50,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:50,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:50,206 INFO L87 Difference]: Start difference. First operand 2396 states and 7101 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:50,275 INFO L93 Difference]: Finished difference Result 2604 states and 7451 transitions. [2021-07-13 19:17:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:50,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:50,279 INFO L225 Difference]: With dead ends: 2604 [2021-07-13 19:17:50,279 INFO L226 Difference]: Without dead ends: 2604 [2021-07-13 19:17:50,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-07-13 19:17:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2417. [2021-07-13 19:17:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9639900662251657) internal successors, (7161), 2416 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7161 transitions. [2021-07-13 19:17:50,310 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7161 transitions. Word has length 20 [2021-07-13 19:17:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:50,310 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7161 transitions. [2021-07-13 19:17:50,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7161 transitions. [2021-07-13 19:17:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:50,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:50,313 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:50,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-07-13 19:17:50,532 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1036907479, now seen corresponding path program 111 times [2021-07-13 19:17:50,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:50,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117838728] [2021-07-13 19:17:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:50,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:50,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117838728] [2021-07-13 19:17:50,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117838728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117028674] [2021-07-13 19:17:50,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:50,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:17:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:50,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:50,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117028674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:50,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:50,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:17:50,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330684243] [2021-07-13 19:17:50,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:50,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:50,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:50,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:50,657 INFO L87 Difference]: Start difference. First operand 2417 states and 7161 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:50,774 INFO L93 Difference]: Finished difference Result 2566 states and 7378 transitions. [2021-07-13 19:17:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:50,777 INFO L225 Difference]: With dead ends: 2566 [2021-07-13 19:17:50,777 INFO L226 Difference]: Without dead ends: 2563 [2021-07-13 19:17:50,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-07-13 19:17:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2417. [2021-07-13 19:17:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9598509933774833) internal successors, (7151), 2416 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7151 transitions. [2021-07-13 19:17:50,804 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7151 transitions. Word has length 20 [2021-07-13 19:17:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:50,804 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7151 transitions. [2021-07-13 19:17:50,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7151 transitions. [2021-07-13 19:17:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:50,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:50,806 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:51,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-07-13 19:17:51,006 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2109992859, now seen corresponding path program 112 times [2021-07-13 19:17:51,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:51,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064139781] [2021-07-13 19:17:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:51,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064139781] [2021-07-13 19:17:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064139781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200539100] [2021-07-13 19:17:51,061 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:51,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:51,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:17:51,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200539100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:51,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:51,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-13 19:17:51,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800410134] [2021-07-13 19:17:51,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:51,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:51,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:51,119 INFO L87 Difference]: Start difference. First operand 2417 states and 7151 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:51,255 INFO L93 Difference]: Finished difference Result 2572 states and 7375 transitions. [2021-07-13 19:17:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:51,259 INFO L225 Difference]: With dead ends: 2572 [2021-07-13 19:17:51,259 INFO L226 Difference]: Without dead ends: 2567 [2021-07-13 19:17:51,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-07-13 19:17:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2417. [2021-07-13 19:17:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9536423841059603) internal successors, (7136), 2416 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7136 transitions. [2021-07-13 19:17:51,284 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7136 transitions. Word has length 20 [2021-07-13 19:17:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:51,284 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7136 transitions. [2021-07-13 19:17:51,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7136 transitions. [2021-07-13 19:17:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:51,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:51,287 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:51,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-13 19:17:51,487 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:51,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:51,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1015901271, now seen corresponding path program 113 times [2021-07-13 19:17:51,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:51,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28954682] [2021-07-13 19:17:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:51,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:51,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28954682] [2021-07-13 19:17:51,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28954682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:51,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992757109] [2021-07-13 19:17:51,552 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:51,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:51,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:51,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:51,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992757109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:51,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:51,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:17:51,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57391360] [2021-07-13 19:17:51,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:51,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:51,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:51,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:51,631 INFO L87 Difference]: Start difference. First operand 2417 states and 7136 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:51,780 INFO L93 Difference]: Finished difference Result 2577 states and 7366 transitions. [2021-07-13 19:17:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:51,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:51,783 INFO L225 Difference]: With dead ends: 2577 [2021-07-13 19:17:51,783 INFO L226 Difference]: Without dead ends: 2571 [2021-07-13 19:17:51,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-07-13 19:17:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2418. [2021-07-13 19:17:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.945800579230451) internal successors, (7120), 2417 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7120 transitions. [2021-07-13 19:17:51,820 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7120 transitions. Word has length 20 [2021-07-13 19:17:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:51,820 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7120 transitions. [2021-07-13 19:17:51,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7120 transitions. [2021-07-13 19:17:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:51,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:51,824 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:52,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:52,036 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:52,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1458800411, now seen corresponding path program 114 times [2021-07-13 19:17:52,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:52,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516251803] [2021-07-13 19:17:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:52,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:52,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516251803] [2021-07-13 19:17:52,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516251803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:52,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488627741] [2021-07-13 19:17:52,102 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:52,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:52,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488627741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:52,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:52,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-13 19:17:52,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451592399] [2021-07-13 19:17:52,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:52,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:52,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:52,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:52,163 INFO L87 Difference]: Start difference. First operand 2418 states and 7120 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:52,321 INFO L93 Difference]: Finished difference Result 2689 states and 7651 transitions. [2021-07-13 19:17:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:52,325 INFO L225 Difference]: With dead ends: 2689 [2021-07-13 19:17:52,325 INFO L226 Difference]: Without dead ends: 2681 [2021-07-13 19:17:52,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-07-13 19:17:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2420. [2021-07-13 19:17:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 2.9450186027284) internal successors, (7124), 2419 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7124 transitions. [2021-07-13 19:17:52,368 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7124 transitions. Word has length 20 [2021-07-13 19:17:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:52,369 INFO L482 AbstractCegarLoop]: Abstraction has 2420 states and 7124 transitions. [2021-07-13 19:17:52,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7124 transitions. [2021-07-13 19:17:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:52,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:52,371 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:52,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-13 19:17:52,593 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:52,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1991195433, now seen corresponding path program 115 times [2021-07-13 19:17:52,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:52,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194188680] [2021-07-13 19:17:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:52,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:52,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194188680] [2021-07-13 19:17:52,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194188680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:52,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463034392] [2021-07-13 19:17:52,664 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:52,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463034392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:52,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:52,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-13 19:17:52,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085634902] [2021-07-13 19:17:52,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:52,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:52,748 INFO L87 Difference]: Start difference. First operand 2420 states and 7124 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:52,905 INFO L93 Difference]: Finished difference Result 2675 states and 7629 transitions. [2021-07-13 19:17:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:52,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:52,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:52,909 INFO L225 Difference]: With dead ends: 2675 [2021-07-13 19:17:52,909 INFO L226 Difference]: Without dead ends: 2660 [2021-07-13 19:17:52,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-07-13 19:17:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2425. [2021-07-13 19:17:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.942656765676568) internal successors, (7133), 2424 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7133 transitions. [2021-07-13 19:17:52,937 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7133 transitions. Word has length 20 [2021-07-13 19:17:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:52,937 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7133 transitions. [2021-07-13 19:17:52,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7133 transitions. [2021-07-13 19:17:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:52,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:52,939 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:53,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:53,140 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash -823260751, now seen corresponding path program 116 times [2021-07-13 19:17:53,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:53,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282414203] [2021-07-13 19:17:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:53,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:53,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282414203] [2021-07-13 19:17:53,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282414203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:53,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561266105] [2021-07-13 19:17:53,195 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:53,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:53,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:53,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:53,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561266105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:53,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:53,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:17:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996185949] [2021-07-13 19:17:53,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:53,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:53,256 INFO L87 Difference]: Start difference. First operand 2425 states and 7133 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:53,362 INFO L93 Difference]: Finished difference Result 2669 states and 7579 transitions. [2021-07-13 19:17:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:53,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:53,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:53,366 INFO L225 Difference]: With dead ends: 2669 [2021-07-13 19:17:53,366 INFO L226 Difference]: Without dead ends: 2669 [2021-07-13 19:17:53,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-07-13 19:17:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2472. [2021-07-13 19:17:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9405099150141645) internal successors, (7266), 2471 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7266 transitions. [2021-07-13 19:17:53,394 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7266 transitions. Word has length 20 [2021-07-13 19:17:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:53,394 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7266 transitions. [2021-07-13 19:17:53,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7266 transitions. [2021-07-13 19:17:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:53,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:53,397 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:53,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:53,599 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1875348307, now seen corresponding path program 117 times [2021-07-13 19:17:53,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:53,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368349390] [2021-07-13 19:17:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:53,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:53,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368349390] [2021-07-13 19:17:53,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368349390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:53,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511802046] [2021-07-13 19:17:53,675 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:53,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:53,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:53,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:53,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511802046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:53,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:53,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:17:53,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609848856] [2021-07-13 19:17:53,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:53,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:53,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:53,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:53,756 INFO L87 Difference]: Start difference. First operand 2472 states and 7266 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:53,871 INFO L93 Difference]: Finished difference Result 2639 states and 7604 transitions. [2021-07-13 19:17:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:53,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:53,875 INFO L225 Difference]: With dead ends: 2639 [2021-07-13 19:17:53,875 INFO L226 Difference]: Without dead ends: 2635 [2021-07-13 19:17:53,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-07-13 19:17:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2472. [2021-07-13 19:17:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9384864427357344) internal successors, (7261), 2471 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7261 transitions. [2021-07-13 19:17:53,908 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7261 transitions. Word has length 20 [2021-07-13 19:17:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:53,908 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7261 transitions. [2021-07-13 19:17:53,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7261 transitions. [2021-07-13 19:17:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:53,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:53,911 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:54,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-07-13 19:17:54,112 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1238881453, now seen corresponding path program 118 times [2021-07-13 19:17:54,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:54,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496926251] [2021-07-13 19:17:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:54,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:54,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496926251] [2021-07-13 19:17:54,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496926251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:54,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516887090] [2021-07-13 19:17:54,188 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:54,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:54,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:54,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:54,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:54,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516887090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:54,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:54,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-13 19:17:54,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707724611] [2021-07-13 19:17:54,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:54,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:54,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:54,251 INFO L87 Difference]: Start difference. First operand 2472 states and 7261 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:54,393 INFO L93 Difference]: Finished difference Result 2718 states and 7731 transitions. [2021-07-13 19:17:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:54,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:54,397 INFO L225 Difference]: With dead ends: 2718 [2021-07-13 19:17:54,397 INFO L226 Difference]: Without dead ends: 2714 [2021-07-13 19:17:54,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:54,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-07-13 19:17:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2472. [2021-07-13 19:17:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9348441926345608) internal successors, (7252), 2471 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7252 transitions. [2021-07-13 19:17:54,427 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7252 transitions. Word has length 20 [2021-07-13 19:17:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:54,427 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7252 transitions. [2021-07-13 19:17:54,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7252 transitions. [2021-07-13 19:17:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:54,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:54,441 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:54,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:54,657 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash 393910001, now seen corresponding path program 119 times [2021-07-13 19:17:54,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:54,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641658584] [2021-07-13 19:17:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:54,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:54,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641658584] [2021-07-13 19:17:54,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641658584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:54,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698930000] [2021-07-13 19:17:54,729 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:54,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:54,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:54,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:54,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698930000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:54,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:54,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-13 19:17:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026584524] [2021-07-13 19:17:54,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:54,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:54,799 INFO L87 Difference]: Start difference. First operand 2472 states and 7252 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:54,945 INFO L93 Difference]: Finished difference Result 2775 states and 7866 transitions. [2021-07-13 19:17:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:54,949 INFO L225 Difference]: With dead ends: 2775 [2021-07-13 19:17:54,949 INFO L226 Difference]: Without dead ends: 2760 [2021-07-13 19:17:54,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-07-13 19:17:54,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2486. [2021-07-13 19:17:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.9287726358148896) internal successors, (7278), 2485 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 7278 transitions. [2021-07-13 19:17:54,976 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 7278 transitions. Word has length 20 [2021-07-13 19:17:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:54,976 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 7278 transitions. [2021-07-13 19:17:54,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 7278 transitions. [2021-07-13 19:17:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:54,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:54,979 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:55,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:55,179 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1540334603, now seen corresponding path program 120 times [2021-07-13 19:17:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:55,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830760193] [2021-07-13 19:17:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:55,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:55,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830760193] [2021-07-13 19:17:55,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830760193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:55,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801709466] [2021-07-13 19:17:55,227 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:55,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:55,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:17:55,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801709466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:55,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:55,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-07-13 19:17:55,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40355100] [2021-07-13 19:17:55,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:55,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:55,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:55,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:55,305 INFO L87 Difference]: Start difference. First operand 2486 states and 7278 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:55,381 INFO L93 Difference]: Finished difference Result 2905 states and 8228 transitions. [2021-07-13 19:17:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 20 [2021-07-13 19:17:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:55,385 INFO L225 Difference]: With dead ends: 2905 [2021-07-13 19:17:55,385 INFO L226 Difference]: Without dead ends: 2905 [2021-07-13 19:17:55,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-07-13 19:17:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2666. [2021-07-13 19:17:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.9448405253283303) internal successors, (7848), 2665 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7848 transitions. [2021-07-13 19:17:55,414 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7848 transitions. Word has length 20 [2021-07-13 19:17:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:55,414 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7848 transitions. [2021-07-13 19:17:55,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7848 transitions. [2021-07-13 19:17:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:55,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:55,417 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:55,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-13 19:17:55,617 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash -889828905, now seen corresponding path program 121 times [2021-07-13 19:17:55,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:55,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543567743] [2021-07-13 19:17:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:55,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543567743] [2021-07-13 19:17:55,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543567743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027380872] [2021-07-13 19:17:55,669 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:55,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:55,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:55,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027380872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:55,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:55,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-07-13 19:17:55,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026592804] [2021-07-13 19:17:55,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:55,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:55,721 INFO L87 Difference]: Start difference. First operand 2666 states and 7848 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:55,830 INFO L93 Difference]: Finished difference Result 2846 states and 8143 transitions. [2021-07-13 19:17:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:55,834 INFO L225 Difference]: With dead ends: 2846 [2021-07-13 19:17:55,834 INFO L226 Difference]: Without dead ends: 2845 [2021-07-13 19:17:55,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-07-13 19:17:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2666. [2021-07-13 19:17:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.94296435272045) internal successors, (7843), 2665 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7843 transitions. [2021-07-13 19:17:55,863 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7843 transitions. Word has length 20 [2021-07-13 19:17:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:55,863 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7843 transitions. [2021-07-13 19:17:55,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7843 transitions. [2021-07-13 19:17:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:55,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:55,866 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:56,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:56,075 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1962914285, now seen corresponding path program 122 times [2021-07-13 19:17:56,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:56,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500009556] [2021-07-13 19:17:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:56,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:56,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500009556] [2021-07-13 19:17:56,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500009556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:56,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562378186] [2021-07-13 19:17:56,140 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:56,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:56,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:56,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562378186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:56,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:56,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-13 19:17:56,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556236875] [2021-07-13 19:17:56,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:56,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:56,200 INFO L87 Difference]: Start difference. First operand 2666 states and 7843 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:56,331 INFO L93 Difference]: Finished difference Result 2854 states and 8145 transitions. [2021-07-13 19:17:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:56,335 INFO L225 Difference]: With dead ends: 2854 [2021-07-13 19:17:56,335 INFO L226 Difference]: Without dead ends: 2849 [2021-07-13 19:17:56,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-07-13 19:17:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2687. [2021-07-13 19:17:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.9389426656738644) internal successors, (7894), 2686 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7894 transitions. [2021-07-13 19:17:56,365 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7894 transitions. Word has length 20 [2021-07-13 19:17:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:56,366 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7894 transitions. [2021-07-13 19:17:56,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7894 transitions. [2021-07-13 19:17:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:56,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:56,368 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:56,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-13 19:17:56,569 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:56,569 INFO L82 PathProgramCache]: Analyzing trace with hash -868822697, now seen corresponding path program 123 times [2021-07-13 19:17:56,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:56,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301532475] [2021-07-13 19:17:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:56,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:56,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301532475] [2021-07-13 19:17:56,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301532475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:56,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26292984] [2021-07-13 19:17:56,627 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:56,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:56,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:56,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:17:56,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26292984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:56,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:56,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-13 19:17:56,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464673890] [2021-07-13 19:17:56,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:56,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:56,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:56,701 INFO L87 Difference]: Start difference. First operand 2687 states and 7894 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:56,806 INFO L93 Difference]: Finished difference Result 3212 states and 8981 transitions. [2021-07-13 19:17:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:17:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:56,810 INFO L225 Difference]: With dead ends: 3212 [2021-07-13 19:17:56,810 INFO L226 Difference]: Without dead ends: 3209 [2021-07-13 19:17:56,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-07-13 19:17:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2687. [2021-07-13 19:17:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.937453462397617) internal successors, (7890), 2686 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7890 transitions. [2021-07-13 19:17:56,842 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7890 transitions. Word has length 20 [2021-07-13 19:17:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:56,842 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7890 transitions. [2021-07-13 19:17:56,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7890 transitions. [2021-07-13 19:17:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:56,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:56,845 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:57,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-07-13 19:17:57,046 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1311721837, now seen corresponding path program 124 times [2021-07-13 19:17:57,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:57,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930378916] [2021-07-13 19:17:57,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:57,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:57,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930378916] [2021-07-13 19:17:57,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930378916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:57,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915333992] [2021-07-13 19:17:57,125 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:57,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:57,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:57,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:57,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:57,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915333992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:57,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:57,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-13 19:17:57,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414673142] [2021-07-13 19:17:57,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:57,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:57,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:57,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:57,192 INFO L87 Difference]: Start difference. First operand 2687 states and 7890 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:57,330 INFO L93 Difference]: Finished difference Result 3217 states and 8981 transitions. [2021-07-13 19:17:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:57,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:57,336 INFO L225 Difference]: With dead ends: 3217 [2021-07-13 19:17:57,336 INFO L226 Difference]: Without dead ends: 3209 [2021-07-13 19:17:57,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-07-13 19:17:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2709. [2021-07-13 19:17:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9309453471196454) internal successors, (7937), 2708 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7937 transitions. [2021-07-13 19:17:57,375 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7937 transitions. Word has length 20 [2021-07-13 19:17:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:57,375 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7937 transitions. [2021-07-13 19:17:57,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7937 transitions. [2021-07-13 19:17:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:57,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:57,378 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:57,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-13 19:17:57,579 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2138274007, now seen corresponding path program 125 times [2021-07-13 19:17:57,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:57,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919776955] [2021-07-13 19:17:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:57,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919776955] [2021-07-13 19:17:57,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919776955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771955043] [2021-07-13 19:17:57,649 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:57,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:57,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:57,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:57,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:57,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771955043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:57,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:57,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-13 19:17:57,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039995699] [2021-07-13 19:17:57,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:57,713 INFO L87 Difference]: Start difference. First operand 2709 states and 7937 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:57,829 INFO L93 Difference]: Finished difference Result 3000 states and 8519 transitions. [2021-07-13 19:17:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:17:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:57,833 INFO L225 Difference]: With dead ends: 3000 [2021-07-13 19:17:57,833 INFO L226 Difference]: Without dead ends: 2995 [2021-07-13 19:17:57,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-07-13 19:17:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2709. [2021-07-13 19:17:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.930576070901034) internal successors, (7936), 2708 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7936 transitions. [2021-07-13 19:17:57,864 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7936 transitions. Word has length 20 [2021-07-13 19:17:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:57,864 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7936 transitions. [2021-07-13 19:17:57,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7936 transitions. [2021-07-13 19:17:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:57,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:57,867 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:58,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:58,089 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1713962771, now seen corresponding path program 126 times [2021-07-13 19:17:58,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:58,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677600789] [2021-07-13 19:17:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:58,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:58,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677600789] [2021-07-13 19:17:58,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677600789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133366279] [2021-07-13 19:17:58,203 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:58,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:58,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:58,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:58,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:58,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133366279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:58,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-13 19:17:58,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119487433] [2021-07-13 19:17:58,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:58,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:58,281 INFO L87 Difference]: Start difference. First operand 2709 states and 7936 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:58,398 INFO L93 Difference]: Finished difference Result 2966 states and 8462 transitions. [2021-07-13 19:17:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:17:58,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:58,402 INFO L225 Difference]: With dead ends: 2966 [2021-07-13 19:17:58,402 INFO L226 Difference]: Without dead ends: 2960 [2021-07-13 19:17:58,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-07-13 19:17:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2709. [2021-07-13 19:17:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9302067946824226) internal successors, (7935), 2708 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7935 transitions. [2021-07-13 19:17:58,437 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7935 transitions. Word has length 20 [2021-07-13 19:17:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:58,437 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7935 transitions. [2021-07-13 19:17:58,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7935 transitions. [2021-07-13 19:17:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:58,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:58,441 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:58,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-07-13 19:17:58,663 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1200498409, now seen corresponding path program 127 times [2021-07-13 19:17:58,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:58,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998228394] [2021-07-13 19:17:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:58,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:58,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998228394] [2021-07-13 19:17:58,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998228394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670975322] [2021-07-13 19:17:58,736 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:58,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:58,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670975322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:58,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:17:58,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445103849] [2021-07-13 19:17:58,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:58,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:58,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:58,821 INFO L87 Difference]: Start difference. First operand 2709 states and 7935 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:58,949 INFO L93 Difference]: Finished difference Result 2994 states and 8494 transitions. [2021-07-13 19:17:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:17:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:58,953 INFO L225 Difference]: With dead ends: 2994 [2021-07-13 19:17:58,953 INFO L226 Difference]: Without dead ends: 2994 [2021-07-13 19:17:58,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-07-13 19:17:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2744. [2021-07-13 19:17:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.930368209989063) internal successors, (8038), 2743 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8038 transitions. [2021-07-13 19:17:58,985 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8038 transitions. Word has length 20 [2021-07-13 19:17:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:58,985 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8038 transitions. [2021-07-13 19:17:58,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8038 transitions. [2021-07-13 19:17:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:58,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:58,988 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:59,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:59,189 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:59,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1877298135, now seen corresponding path program 128 times [2021-07-13 19:17:59,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:59,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004992288] [2021-07-13 19:17:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:59,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:59,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004992288] [2021-07-13 19:17:59,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004992288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:59,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934685560] [2021-07-13 19:17:59,261 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:59,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:59,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:59,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:17:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:59,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934685560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:59,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:59,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-07-13 19:17:59,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344770999] [2021-07-13 19:17:59,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:59,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:59,329 INFO L87 Difference]: Start difference. First operand 2744 states and 8038 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:59,462 INFO L93 Difference]: Finished difference Result 2954 states and 8469 transitions. [2021-07-13 19:17:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:59,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:59,466 INFO L225 Difference]: With dead ends: 2954 [2021-07-13 19:17:59,466 INFO L226 Difference]: Without dead ends: 2949 [2021-07-13 19:17:59,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-07-13 19:17:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2744. [2021-07-13 19:17:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.9292745169522423) internal successors, (8035), 2743 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8035 transitions. [2021-07-13 19:17:59,513 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8035 transitions. Word has length 20 [2021-07-13 19:17:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:59,513 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8035 transitions. [2021-07-13 19:17:59,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8035 transitions. [2021-07-13 19:17:59,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:59,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:59,516 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:59,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:59,725 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash -132934129, now seen corresponding path program 129 times [2021-07-13 19:17:59,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:59,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440609314] [2021-07-13 19:17:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:59,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440609314] [2021-07-13 19:17:59,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440609314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105361420] [2021-07-13 19:17:59,812 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:59,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:59,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:59,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105361420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:59,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:59,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 19:17:59,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530420664] [2021-07-13 19:17:59,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:59,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:59,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:59,889 INFO L87 Difference]: Start difference. First operand 2744 states and 8035 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:00,032 INFO L93 Difference]: Finished difference Result 3147 states and 8824 transitions. [2021-07-13 19:18:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:00,036 INFO L225 Difference]: With dead ends: 3147 [2021-07-13 19:18:00,036 INFO L226 Difference]: Without dead ends: 3132 [2021-07-13 19:18:00,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:18:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-07-13 19:18:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2748. [2021-07-13 19:18:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.9257371678194395) internal successors, (8037), 2747 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8037 transitions. [2021-07-13 19:18:00,072 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8037 transitions. Word has length 20 [2021-07-13 19:18:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:00,072 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8037 transitions. [2021-07-13 19:18:00,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8037 transitions. [2021-07-13 19:18:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:00,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:00,074 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:00,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:00,275 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:00,275 INFO L82 PathProgramCache]: Analyzing trace with hash -557245365, now seen corresponding path program 130 times [2021-07-13 19:18:00,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:00,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109762013] [2021-07-13 19:18:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:00,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:00,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109762013] [2021-07-13 19:18:00,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109762013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442574777] [2021-07-13 19:18:00,349 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:00,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:00,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:00,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442574777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:00,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-07-13 19:18:00,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318495722] [2021-07-13 19:18:00,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:00,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:00,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:00,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:00,421 INFO L87 Difference]: Start difference. First operand 2748 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:00,559 INFO L93 Difference]: Finished difference Result 3023 states and 8605 transitions. [2021-07-13 19:18:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:00,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:00,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:00,564 INFO L225 Difference]: With dead ends: 3023 [2021-07-13 19:18:00,564 INFO L226 Difference]: Without dead ends: 3017 [2021-07-13 19:18:00,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:18:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-07-13 19:18:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2748. [2021-07-13 19:18:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.925373134328358) internal successors, (8036), 2747 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8036 transitions. [2021-07-13 19:18:00,601 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8036 transitions. Word has length 20 [2021-07-13 19:18:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:00,601 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8036 transitions. [2021-07-13 19:18:00,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8036 transitions. [2021-07-13 19:18:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:00,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:00,604 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:00,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:00,804 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1275866105, now seen corresponding path program 131 times [2021-07-13 19:18:00,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:00,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709822551] [2021-07-13 19:18:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:00,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:00,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709822551] [2021-07-13 19:18:00,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709822551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374619331] [2021-07-13 19:18:00,872 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:00,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:18:00,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:00,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:00,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374619331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:00,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-07-13 19:18:00,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236209710] [2021-07-13 19:18:00,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:00,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:00,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:00,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:00,951 INFO L87 Difference]: Start difference. First operand 2748 states and 8036 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2021-07-13 19:18:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:01,044 INFO L93 Difference]: Finished difference Result 3263 states and 9284 transitions. [2021-07-13 19:18:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:01,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 20 [2021-07-13 19:18:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:01,048 INFO L225 Difference]: With dead ends: 3263 [2021-07-13 19:18:01,048 INFO L226 Difference]: Without dead ends: 3263 [2021-07-13 19:18:01,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-07-13 19:18:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3010. [2021-07-13 19:18:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.9478231970754405) internal successors, (8870), 3009 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8870 transitions. [2021-07-13 19:18:01,082 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8870 transitions. Word has length 20 [2021-07-13 19:18:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:01,083 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8870 transitions. [2021-07-13 19:18:01,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2021-07-13 19:18:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8870 transitions. [2021-07-13 19:18:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:01,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:01,086 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:01,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-13 19:18:01,287 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:01,287 INFO L82 PathProgramCache]: Analyzing trace with hash -625360407, now seen corresponding path program 132 times [2021-07-13 19:18:01,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:01,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967766741] [2021-07-13 19:18:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:01,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:01,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967766741] [2021-07-13 19:18:01,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967766741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921192016] [2021-07-13 19:18:01,371 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:01,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:18:01,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:01,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:01,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:18:01,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921192016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:01,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-07-13 19:18:01,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158093949] [2021-07-13 19:18:01,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:01,454 INFO L87 Difference]: Start difference. First operand 3010 states and 8870 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:01,594 INFO L93 Difference]: Finished difference Result 3211 states and 9205 transitions. [2021-07-13 19:18:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:01,598 INFO L225 Difference]: With dead ends: 3211 [2021-07-13 19:18:01,598 INFO L226 Difference]: Without dead ends: 3210 [2021-07-13 19:18:01,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-07-13 19:18:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3010. [2021-07-13 19:18:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.94749086075108) internal successors, (8869), 3009 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8869 transitions. [2021-07-13 19:18:01,633 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8869 transitions. Word has length 20 [2021-07-13 19:18:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:01,633 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8869 transitions. [2021-07-13 19:18:01,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8869 transitions. [2021-07-13 19:18:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:01,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:01,635 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:01,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-13 19:18:01,836 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445787, now seen corresponding path program 133 times [2021-07-13 19:18:01,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:01,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767931983] [2021-07-13 19:18:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:01,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:01,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767931983] [2021-07-13 19:18:01,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767931983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546281404] [2021-07-13 19:18:01,902 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:01,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:01,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:01,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546281404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:01,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-07-13 19:18:01,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745165605] [2021-07-13 19:18:01,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:01,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:01,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:01,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:01,983 INFO L87 Difference]: Start difference. First operand 3010 states and 8869 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:02,117 INFO L93 Difference]: Finished difference Result 3214 states and 9207 transitions. [2021-07-13 19:18:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:02,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:02,121 INFO L225 Difference]: With dead ends: 3214 [2021-07-13 19:18:02,121 INFO L226 Difference]: Without dead ends: 3211 [2021-07-13 19:18:02,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-07-13 19:18:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3017. [2021-07-13 19:18:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9462864721485413) internal successors, (8886), 3016 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8886 transitions. [2021-07-13 19:18:02,153 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8886 transitions. Word has length 20 [2021-07-13 19:18:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:02,153 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8886 transitions. [2021-07-13 19:18:02,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8886 transitions. [2021-07-13 19:18:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:02,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:02,156 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:02,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-13 19:18:02,356 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash -604354199, now seen corresponding path program 134 times [2021-07-13 19:18:02,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:02,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959428478] [2021-07-13 19:18:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:02,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959428478] [2021-07-13 19:18:02,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959428478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909083500] [2021-07-13 19:18:02,425 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:02,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:02,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:02,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:02,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:02,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909083500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:02,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-07-13 19:18:02,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054938439] [2021-07-13 19:18:02,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:02,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:02,493 INFO L87 Difference]: Start difference. First operand 3017 states and 8886 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:02,619 INFO L93 Difference]: Finished difference Result 3712 states and 10403 transitions. [2021-07-13 19:18:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:02,624 INFO L225 Difference]: With dead ends: 3712 [2021-07-13 19:18:02,624 INFO L226 Difference]: Without dead ends: 3709 [2021-07-13 19:18:02,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-07-13 19:18:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3017. [2021-07-13 19:18:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9449602122015914) internal successors, (8882), 3016 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8882 transitions. [2021-07-13 19:18:02,660 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8882 transitions. Word has length 20 [2021-07-13 19:18:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:02,660 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8882 transitions. [2021-07-13 19:18:02,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8882 transitions. [2021-07-13 19:18:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:02,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:02,663 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:02,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-13 19:18:02,863 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1047253339, now seen corresponding path program 135 times [2021-07-13 19:18:02,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:02,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668845344] [2021-07-13 19:18:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:02,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:02,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668845344] [2021-07-13 19:18:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668845344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857018758] [2021-07-13 19:18:02,953 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:03,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:18:03,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:03,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:18:03,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857018758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:03,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-07-13 19:18:03,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115167287] [2021-07-13 19:18:03,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:03,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:03,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:03,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:03,051 INFO L87 Difference]: Start difference. First operand 3017 states and 8882 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:03,177 INFO L93 Difference]: Finished difference Result 3583 states and 10063 transitions. [2021-07-13 19:18:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:03,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:03,182 INFO L225 Difference]: With dead ends: 3583 [2021-07-13 19:18:03,182 INFO L226 Difference]: Without dead ends: 3579 [2021-07-13 19:18:03,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-07-13 19:18:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3017. [2021-07-13 19:18:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.944297082228117) internal successors, (8880), 3016 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8880 transitions. [2021-07-13 19:18:03,219 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8880 transitions. Word has length 20 [2021-07-13 19:18:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:03,219 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8880 transitions. [2021-07-13 19:18:03,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8880 transitions. [2021-07-13 19:18:03,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:03,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:03,221 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:03,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:03,422 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1892224791, now seen corresponding path program 136 times [2021-07-13 19:18:03,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:03,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046087585] [2021-07-13 19:18:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:03,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:03,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046087585] [2021-07-13 19:18:03,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046087585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076906182] [2021-07-13 19:18:03,550 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:03,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:03,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:03,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076906182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:03,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-07-13 19:18:03,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627995519] [2021-07-13 19:18:03,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:03,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:03,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:03,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:03,637 INFO L87 Difference]: Start difference. First operand 3017 states and 8880 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:03,791 INFO L93 Difference]: Finished difference Result 3595 states and 10071 transitions. [2021-07-13 19:18:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:03,797 INFO L225 Difference]: With dead ends: 3595 [2021-07-13 19:18:03,797 INFO L226 Difference]: Without dead ends: 3580 [2021-07-13 19:18:03,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:18:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-07-13 19:18:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3038. [2021-07-13 19:18:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.9400724399078038) internal successors, (8929), 3037 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8929 transitions. [2021-07-13 19:18:03,850 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8929 transitions. Word has length 20 [2021-07-13 19:18:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:03,850 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8929 transitions. [2021-07-13 19:18:03,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8929 transitions. [2021-07-13 19:18:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:03,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:03,854 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:04,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-07-13 19:18:04,067 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:04,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:04,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1978431269, now seen corresponding path program 137 times [2021-07-13 19:18:04,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:04,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764851104] [2021-07-13 19:18:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:04,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764851104] [2021-07-13 19:18:04,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764851104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216313755] [2021-07-13 19:18:04,147 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 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 [2021-07-13 19:18:04,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:18:04,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:04,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216313755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:04,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-07-13 19:18:04,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102855641] [2021-07-13 19:18:04,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:04,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:04,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:04,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:04,239 INFO L87 Difference]: Start difference. First operand 3038 states and 8929 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:04,374 INFO L93 Difference]: Finished difference Result 3383 states and 9628 transitions. [2021-07-13 19:18:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:04,379 INFO L225 Difference]: With dead ends: 3383 [2021-07-13 19:18:04,379 INFO L226 Difference]: Without dead ends: 3377 [2021-07-13 19:18:04,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:18:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-07-13 19:18:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3038. [2021-07-13 19:18:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939743167599605) internal successors, (8928), 3037 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8928 transitions. [2021-07-13 19:18:04,413 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8928 transitions. Word has length 20 [2021-07-13 19:18:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:04,414 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8928 transitions. [2021-07-13 19:18:04,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8928 transitions. [2021-07-13 19:18:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:18:04,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:04,416 INFO L508 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:04,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-13 19:18:04,617 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1709684841, now seen corresponding path program 138 times [2021-07-13 19:18:04,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:04,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307602956] [2021-07-13 19:18:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:04,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307602956] [2021-07-13 19:18:04,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307602956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473597168] [2021-07-13 19:18:04,715 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 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 [2021-07-13 19:18:04,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:18:04,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:04,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:18:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:04,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473597168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:04,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-07-13 19:18:04,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147328423] [2021-07-13 19:18:04,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:18:04,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:18:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:04,801 INFO L87 Difference]: Start difference. First operand 3038 states and 8928 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:04,939 INFO L93 Difference]: Finished difference Result 3346 states and 9565 transitions. [2021-07-13 19:18:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:18:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:04,943 INFO L225 Difference]: With dead ends: 3346 [2021-07-13 19:18:04,944 INFO L226 Difference]: Without dead ends: 3339 [2021-07-13 19:18:04,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:18:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-07-13 19:18:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3038. [2021-07-13 19:18:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939413895291406) internal successors, (8927), 3037 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8927 transitions. [2021-07-13 19:18:04,978 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8927 transitions. Word has length 20 [2021-07-13 19:18:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:04,978 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8927 transitions. [2021-07-13 19:18:04,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8927 transitions. [2021-07-13 19:18:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:18:04,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:04,981 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:05,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-07-13 19:18:05,182 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:05,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1876737230, now seen corresponding path program 139 times [2021-07-13 19:18:05,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:05,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326602222] [2021-07-13 19:18:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:05,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:05,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326602222] [2021-07-13 19:18:05,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326602222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:05,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609898438] [2021-07-13 19:18:05,245 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 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 [2021-07-13 19:18:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:18:05,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:05,605 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:18:05,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:05,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:18:07,112 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-07-13 19:18:07,239 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-07-13 19:18:07,396 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 303 [2021-07-13 19:18:07,618 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 389 [2021-07-13 19:18:07,752 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 302 [2021-07-13 19:18:07,983 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 310 [2021-07-13 19:18:09,119 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 244 [2021-07-13 19:18:09,284 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 252 [2021-07-13 19:18:09,467 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-07-13 19:18:09,668 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-07-13 19:18:09,882 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 297 [2021-07-13 19:18:10,011 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 234 [2021-07-13 19:18:10,834 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 150 [2021-07-13 19:18:11,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:18:11,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:11,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:18:11,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:18:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:11,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609898438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:11,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:11,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:18:11,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492693944] [2021-07-13 19:18:11,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:18:11,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:18:11,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:11,042 INFO L87 Difference]: Start difference. First operand 3038 states and 8927 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:11,210 INFO L93 Difference]: Finished difference Result 3126 states and 9098 transitions. [2021-07-13 19:18:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:18:11,210 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:18:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:11,215 INFO L225 Difference]: With dead ends: 3126 [2021-07-13 19:18:11,215 INFO L226 Difference]: Without dead ends: 3123 [2021-07-13 19:18:11,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-07-13 19:18:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3077. [2021-07-13 19:18:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.935305591677503) internal successors, (9029), 3076 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 9029 transitions. [2021-07-13 19:18:11,249 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 9029 transitions. Word has length 21 [2021-07-13 19:18:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:11,249 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 9029 transitions. [2021-07-13 19:18:11,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 9029 transitions. [2021-07-13 19:18:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:18:11,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:11,251 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:11,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:11,452 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:11,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1748440654, now seen corresponding path program 140 times [2021-07-13 19:18:11,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:11,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206719326] [2021-07-13 19:18:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:11,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:11,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206719326] [2021-07-13 19:18:11,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206719326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:11,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599553581] [2021-07-13 19:18:11,525 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 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 [2021-07-13 19:18:11,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:11,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:11,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:18:11,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:11,884 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:18:11,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:11,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:18:12,543 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-07-13 19:18:12,673 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-07-13 19:18:12,793 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 255 [2021-07-13 19:18:12,923 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 268 [2021-07-13 19:18:13,201 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 340 [2021-07-13 19:18:14,149 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 284 [2021-07-13 19:18:14,350 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 304 [2021-07-13 19:18:14,581 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-07-13 19:18:14,821 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-07-13 19:18:15,088 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 332 [2021-07-13 19:18:15,545 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 351 [2021-07-13 19:18:15,734 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 214 [2021-07-13 19:18:16,330 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 268 [2021-07-13 19:18:16,876 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-07-13 19:18:17,017 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-07-13 19:18:17,223 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 269 [2021-07-13 19:18:17,402 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 277 [2021-07-13 19:18:18,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:18:18,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:18,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:18:18,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:18:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:18,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599553581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:18,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:18,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:18:18,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905932966] [2021-07-13 19:18:18,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:18:18,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:18:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:18,231 INFO L87 Difference]: Start difference. First operand 3077 states and 9029 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:18,452 INFO L93 Difference]: Finished difference Result 3204 states and 9307 transitions. [2021-07-13 19:18:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:18:18,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:18:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:18,457 INFO L225 Difference]: With dead ends: 3204 [2021-07-13 19:18:18,457 INFO L226 Difference]: Without dead ends: 3200 [2021-07-13 19:18:18,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-07-13 19:18:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3145. [2021-07-13 19:18:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 2.931933842239186) internal successors, (9218), 3144 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 9218 transitions. [2021-07-13 19:18:18,497 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 9218 transitions. Word has length 21 [2021-07-13 19:18:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:18,497 INFO L482 AbstractCegarLoop]: Abstraction has 3145 states and 9218 transitions. [2021-07-13 19:18:18,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 9218 transitions. [2021-07-13 19:18:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:18:18,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:18,500 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:18,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-07-13 19:18:18,701 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1114512810, now seen corresponding path program 141 times [2021-07-13 19:18:18,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:18,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418265363] [2021-07-13 19:18:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:18,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:18,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418265363] [2021-07-13 19:18:18,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418265363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:18,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908455234] [2021-07-13 19:18:18,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:18,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:18:18,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:18:18,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:19,120 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:18:19,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:19,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:18:19,928 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 243 [2021-07-13 19:18:20,152 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 320 [2021-07-13 19:18:20,340 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 293 [2021-07-13 19:18:20,464 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 243 [2021-07-13 19:18:21,378 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 217 [2021-07-13 19:18:22,127 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 355 [2021-07-13 19:18:23,296 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 244 [2021-07-13 19:18:23,660 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 526 [2021-07-13 19:18:24,192 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 620 [2021-07-13 19:18:24,786 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 627 [2021-07-13 19:18:25,591 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-07-13 19:18:26,361 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-07-13 19:18:27,195 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 737 [2021-07-13 19:18:27,466 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 469 [2021-07-13 19:18:27,603 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 360 [2021-07-13 19:18:27,780 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 360 [2021-07-13 19:18:28,539 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 228 [2021-07-13 19:18:28,705 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-07-13 19:18:28,873 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-07-13 19:18:29,055 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 312 [2021-07-13 19:18:29,419 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 235 [2021-07-13 19:18:29,566 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 187 [2021-07-13 19:18:29,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:18:29,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:29,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:18:29,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:18:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:29,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908455234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:29,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:29,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:18:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062630240] [2021-07-13 19:18:29,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:18:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:18:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:29,828 INFO L87 Difference]: Start difference. First operand 3145 states and 9218 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:30,060 INFO L93 Difference]: Finished difference Result 3276 states and 9505 transitions. [2021-07-13 19:18:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:18:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:18:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:30,064 INFO L225 Difference]: With dead ends: 3276 [2021-07-13 19:18:30,064 INFO L226 Difference]: Without dead ends: 3272 [2021-07-13 19:18:30,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-07-13 19:18:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3208. [2021-07-13 19:18:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.9307764265668848) internal successors, (9399), 3207 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 9399 transitions. [2021-07-13 19:18:30,101 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 9399 transitions. Word has length 21 [2021-07-13 19:18:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:30,101 INFO L482 AbstractCegarLoop]: Abstraction has 3208 states and 9399 transitions. [2021-07-13 19:18:30,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 9399 transitions. [2021-07-13 19:18:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:18:30,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:30,104 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:30,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-07-13 19:18:30,306 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:30,306 INFO L82 PathProgramCache]: Analyzing trace with hash -328243022, now seen corresponding path program 142 times [2021-07-13 19:18:30,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:30,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258857403] [2021-07-13 19:18:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:30,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:30,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258857403] [2021-07-13 19:18:30,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258857403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:30,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744525691] [2021-07-13 19:18:30,386 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 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 [2021-07-13 19:18:30,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:18:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:30,746 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:18:30,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:30,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:18:31,527 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 257 [2021-07-13 19:18:33,779 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 300 [2021-07-13 19:18:33,998 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 388 [2021-07-13 19:18:34,286 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 391 [2021-07-13 19:18:34,672 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 436 [2021-07-13 19:18:35,125 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 485 [2021-07-13 19:18:35,936 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 248 [2021-07-13 19:18:36,513 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 308 [2021-07-13 19:18:36,861 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 349 [2021-07-13 19:18:37,199 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 366 [2021-07-13 19:18:38,022 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 721 [2021-07-13 19:18:39,006 WARN L205 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-07-13 19:18:39,987 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-07-13 19:18:41,071 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1306 DAG size of output: 771 [2021-07-13 19:18:42,119 WARN L205 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 843 [2021-07-13 19:18:42,438 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 345 [2021-07-13 19:18:43,460 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 655 [2021-07-13 19:18:43,751 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 380 [2021-07-13 19:18:44,300 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 247 [2021-07-13 19:18:44,520 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-07-13 19:18:44,750 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-07-13 19:18:45,064 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 376 [2021-07-13 19:18:45,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:18:45,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:45,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:18:45,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:18:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:45,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744525691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:45,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:45,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:18:45,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437254507] [2021-07-13 19:18:45,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:18:45,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:18:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:45,730 INFO L87 Difference]: Start difference. First operand 3208 states and 9399 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:45,947 INFO L93 Difference]: Finished difference Result 3340 states and 9684 transitions. [2021-07-13 19:18:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:18:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:18:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:45,952 INFO L225 Difference]: With dead ends: 3340 [2021-07-13 19:18:45,952 INFO L226 Difference]: Without dead ends: 3336 [2021-07-13 19:18:45,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-07-13 19:18:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3260. [2021-07-13 19:18:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.933722000613685) internal successors, (9561), 3259 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 9561 transitions. [2021-07-13 19:18:45,999 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 9561 transitions. Word has length 21 [2021-07-13 19:18:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:45,999 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 9561 transitions. [2021-07-13 19:18:45,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 9561 transitions. [2021-07-13 19:18:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:18:46,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:46,002 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:46,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:46,203 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:46,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2104000854, now seen corresponding path program 143 times [2021-07-13 19:18:46,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:46,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472538321] [2021-07-13 19:18:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:46,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:46,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472538321] [2021-07-13 19:18:46,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472538321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:46,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91769456] [2021-07-13 19:18:46,289 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 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 [2021-07-13 19:18:46,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:18:46,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:18:46,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:46,658 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:18:46,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:46,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:18:47,255 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 222 [2021-07-13 19:18:47,444 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 230 [2021-07-13 19:18:47,629 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 314 [2021-07-13 19:18:47,758 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 235 [2021-07-13 19:18:48,372 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 243 [2021-07-13 19:18:49,010 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 344 [2021-07-13 19:18:49,272 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 351 [2021-07-13 19:18:50,103 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 219 [2021-07-13 19:18:50,259 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 280 [2021-07-13 19:18:50,745 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-07-13 19:18:51,215 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-07-13 19:18:51,715 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 511 [2021-07-13 19:18:52,197 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 517 [2021-07-13 19:18:52,823 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 410 [2021-07-13 19:18:53,685 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-07-13 19:18:53,940 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-07-13 19:18:54,181 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-07-13 19:18:54,545 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 387 [2021-07-13 19:18:55,187 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 232 [2021-07-13 19:18:55,299 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 232 [2021-07-13 19:18:55,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:18:55,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:55,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:18:55,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:18:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:55,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91769456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:55,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:55,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:18:55,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109756874] [2021-07-13 19:18:55,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:18:55,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:55,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:18:55,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:55,691 INFO L87 Difference]: Start difference. First operand 3260 states and 9561 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:55,910 INFO L93 Difference]: Finished difference Result 3397 states and 9873 transitions. [2021-07-13 19:18:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:18:55,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:18:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:55,915 INFO L225 Difference]: With dead ends: 3397 [2021-07-13 19:18:55,915 INFO L226 Difference]: Without dead ends: 3392 [2021-07-13 19:18:55,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-07-13 19:18:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3328. [2021-07-13 19:18:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 2.935076645626691) internal successors, (9765), 3327 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 9765 transitions. [2021-07-13 19:18:55,953 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 9765 transitions. Word has length 21 [2021-07-13 19:18:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:55,953 INFO L482 AbstractCegarLoop]: Abstraction has 3328 states and 9765 transitions. [2021-07-13 19:18:55,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 9765 transitions. [2021-07-13 19:18:55,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:18:55,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:55,956 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:56,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3337 [2021-07-13 19:18:56,156 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1317918798, now seen corresponding path program 144 times [2021-07-13 19:18:56,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:56,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281503896] [2021-07-13 19:18:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:56,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:56,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281503896] [2021-07-13 19:18:56,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281503896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:56,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420281182] [2021-07-13 19:18:56,216 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 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 [2021-07-13 19:18:56,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:18:56,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:18:56,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:56,569 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:18:56,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:18:56,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:18:57,267 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 235 [2021-07-13 19:18:57,408 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 242 [2021-07-13 19:18:57,998 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 248 [2021-07-13 19:18:58,854 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-07-13 19:18:59,076 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-07-13 19:18:59,337 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 348 [2021-07-13 19:19:00,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:19:00,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:19:00,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:19:00,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:19:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:00,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420281182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:00,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:00,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:19:00,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406022023] [2021-07-13 19:19:00,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:19:00,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:00,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:19:00,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:19:00,293 INFO L87 Difference]: Start difference. First operand 3328 states and 9765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:00,525 INFO L93 Difference]: Finished difference Result 3484 states and 10127 transitions. [2021-07-13 19:19:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:00,526 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:19:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:00,530 INFO L225 Difference]: With dead ends: 3484 [2021-07-13 19:19:00,530 INFO L226 Difference]: Without dead ends: 3480 [2021-07-13 19:19:00,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:19:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-07-13 19:19:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3406. [2021-07-13 19:19:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.9392070484581496) internal successors, (10008), 3405 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 10008 transitions. [2021-07-13 19:19:00,571 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 10008 transitions. Word has length 21 [2021-07-13 19:19:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:00,571 INFO L482 AbstractCegarLoop]: Abstraction has 3406 states and 10008 transitions. [2021-07-13 19:19:00,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 10008 transitions. [2021-07-13 19:19:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:19:00,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:00,574 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:00,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3893,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:00,775 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1575788458, now seen corresponding path program 145 times [2021-07-13 19:19:00,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:00,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388454501] [2021-07-13 19:19:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:00,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:00,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388454501] [2021-07-13 19:19:00,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388454501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:00,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069564340] [2021-07-13 19:19:00,837 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 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 [2021-07-13 19:19:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:00,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:19:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:01,185 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:19:01,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:19:01,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:19:01,721 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 210 [2021-07-13 19:19:02,540 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 240 [2021-07-13 19:19:02,668 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-07-13 19:19:02,794 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-07-13 19:19:02,991 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 272 [2021-07-13 19:19:03,107 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 236 [2021-07-13 19:19:03,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:19:03,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:19:03,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:19:03,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:19:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:03,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069564340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:03,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:03,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:19:03,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390933666] [2021-07-13 19:19:03,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:19:03,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:03,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:19:03,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:19:03,765 INFO L87 Difference]: Start difference. First operand 3406 states and 10008 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:04,038 INFO L93 Difference]: Finished difference Result 3580 states and 10428 transitions. [2021-07-13 19:19:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:19:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:04,043 INFO L225 Difference]: With dead ends: 3580 [2021-07-13 19:19:04,043 INFO L226 Difference]: Without dead ends: 3576 [2021-07-13 19:19:04,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:19:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-07-13 19:19:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3502. [2021-07-13 19:19:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.9460154241645244) internal successors, (10314), 3501 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 10314 transitions. [2021-07-13 19:19:04,082 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 10314 transitions. Word has length 21 [2021-07-13 19:19:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:04,082 INFO L482 AbstractCegarLoop]: Abstraction has 3502 states and 10314 transitions. [2021-07-13 19:19:04,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 10314 transitions. [2021-07-13 19:19:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:19:04,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:04,086 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:04,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4195 [2021-07-13 19:19:04,286 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:04,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1086400178, now seen corresponding path program 146 times [2021-07-13 19:19:04,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:04,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797734658] [2021-07-13 19:19:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:04,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:04,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797734658] [2021-07-13 19:19:04,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797734658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:04,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282231059] [2021-07-13 19:19:04,347 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 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 [2021-07-13 19:19:04,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:04,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:04,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:19:04,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:04,734 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:19:04,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:19:04,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:19:06,056 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 235 [2021-07-13 19:19:06,889 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-07-13 19:19:07,111 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-07-13 19:19:07,331 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 334 [2021-07-13 19:19:07,492 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 378 [2021-07-13 19:19:08,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:19:08,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:19:08,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:19:08,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:19:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:08,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282231059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:08,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:08,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:19:08,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109684089] [2021-07-13 19:19:08,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:19:08,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:08,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:19:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:19:08,299 INFO L87 Difference]: Start difference. First operand 3502 states and 10314 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:08,564 INFO L93 Difference]: Finished difference Result 3937 states and 11542 transitions. [2021-07-13 19:19:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:19:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:08,570 INFO L225 Difference]: With dead ends: 3937 [2021-07-13 19:19:08,570 INFO L226 Difference]: Without dead ends: 3934 [2021-07-13 19:19:08,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:19:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-07-13 19:19:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3870. [2021-07-13 19:19:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.9581287154303437) internal successors, (11445), 3869 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 11445 transitions. [2021-07-13 19:19:08,616 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 11445 transitions. Word has length 21 [2021-07-13 19:19:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:08,616 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 11445 transitions. [2021-07-13 19:19:08,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 11445 transitions. [2021-07-13 19:19:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:19:08,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:08,620 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:08,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4581,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:08,820 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1199734614, now seen corresponding path program 147 times [2021-07-13 19:19:08,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:08,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530212602] [2021-07-13 19:19:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:08,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:08,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530212602] [2021-07-13 19:19:08,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530212602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:08,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233678718] [2021-07-13 19:19:08,880 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 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 [2021-07-13 19:19:08,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:19:08,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:08,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:19:08,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:09,244 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:19:09,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:19:09,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:19:09,906 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2021-07-13 19:19:10,072 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-07-13 19:19:10,212 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-07-13 19:19:10,379 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 308 [2021-07-13 19:19:10,654 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 371 [2021-07-13 19:19:10,800 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 286 [2021-07-13 19:19:11,003 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 343 [2021-07-13 19:19:11,143 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 296 [2021-07-13 19:19:12,322 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 300 [2021-07-13 19:19:14,336 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 236 [2021-07-13 19:19:14,575 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 342 [2021-07-13 19:19:14,944 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 494 [2021-07-13 19:19:15,602 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 728 [2021-07-13 19:19:15,789 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 338 [2021-07-13 19:19:16,026 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 347 [2021-07-13 19:19:16,756 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 309 [2021-07-13 19:19:17,285 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-07-13 19:19:17,915 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 249 [2021-07-13 19:19:18,190 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 449 [2021-07-13 19:19:18,673 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 568 [2021-07-13 19:19:19,478 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 263 [2021-07-13 19:19:20,216 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 763 [2021-07-13 19:19:20,391 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 273 [2021-07-13 19:19:21,669 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 274 [2021-07-13 19:19:21,910 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 376 [2021-07-13 19:19:22,713 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 495 [2021-07-13 19:19:24,022 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 1457 DAG size of output: 1160 [2021-07-13 19:19:26,241 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 2117 DAG size of output: 1722 [2021-07-13 19:19:28,838 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 2126 DAG size of output: 1700 [2021-07-13 19:19:31,498 WARN L205 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 2297 DAG size of output: 1855 [2021-07-13 19:19:34,586 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 2314 DAG size of output: 1868 [2021-07-13 19:19:38,128 WARN L205 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-07-13 19:19:41,644 WARN L205 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-07-13 19:19:45,507 WARN L205 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 2413 DAG size of output: 1935 [2021-07-13 19:19:50,275 WARN L205 SmtUtils]: Spent 4.76 s on a formula simplification. DAG size of input: 1937 DAG size of output: 1926 [2021-07-13 19:19:50,434 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 1913 [2021-07-13 19:19:50,628 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 292 [2021-07-13 19:19:50,769 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 247 [2021-07-13 19:19:50,899 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 272 [2021-07-13 19:19:52,217 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 224 [2021-07-13 19:19:53,455 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 271 [2021-07-13 19:19:53,719 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 324 [2021-07-13 19:19:54,457 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 898 DAG size of output: 474 [2021-07-13 19:19:56,972 WARN L205 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 1831 DAG size of output: 1691 [2021-07-13 19:19:58,424 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1637 [2021-07-13 19:19:58,623 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1484 DAG size of output: 1484 [2021-07-13 19:19:59,734 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 428 [2021-07-13 19:20:00,144 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 471 [2021-07-13 19:20:01,202 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-07-13 19:20:01,338 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-07-13 19:20:01,638 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 935 [2021-07-13 19:20:02,461 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 562 [2021-07-13 19:20:02,856 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 370 [2021-07-13 19:20:03,250 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 325 [2021-07-13 19:20:03,399 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 216 [2021-07-13 19:20:03,930 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-07-13 19:20:04,101 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-07-13 19:20:04,352 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 177 [2021-07-13 19:20:05,184 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 457 [2021-07-13 19:20:05,695 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 1452 DAG size of output: 748 [2021-07-13 19:20:05,917 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 269 [2021-07-13 19:20:06,456 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 225 [2021-07-13 19:20:06,597 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 238 [2021-07-13 19:20:07,269 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 265 [2021-07-13 19:20:07,453 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 297 [2021-07-13 19:20:08,273 WARN L205 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 1854 DAG size of output: 987 [2021-07-13 19:20:09,485 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1941 DAG size of output: 1041 [2021-07-13 19:20:11,079 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 2661 DAG size of output: 1346 [2021-07-13 19:20:12,926 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-07-13 19:20:14,775 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-07-13 19:20:16,749 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 2695 DAG size of output: 1379 [2021-07-13 19:20:18,812 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 1381 DAG size of output: 1259 [2021-07-13 19:20:19,864 WARN L205 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 913 DAG size of output: 759 [2021-07-13 19:20:20,660 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 234 [2021-07-13 19:20:21,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:20:21,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:20:21,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:20:21,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:20:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:21,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233678718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:21,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:21,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:20:21,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992990273] [2021-07-13 19:20:21,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:20:21,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:20:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:20:21,043 INFO L87 Difference]: Start difference. First operand 3870 states and 11445 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:21,282 INFO L93 Difference]: Finished difference Result 4316 states and 12694 transitions. [2021-07-13 19:20:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:20:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:20:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:21,289 INFO L225 Difference]: With dead ends: 4316 [2021-07-13 19:20:21,289 INFO L226 Difference]: Without dead ends: 4313 [2021-07-13 19:20:21,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:20:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-07-13 19:20:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4248. [2021-07-13 19:20:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.9684483164586766) internal successors, (12607), 4247 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12607 transitions. [2021-07-13 19:20:21,346 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12607 transitions. Word has length 21 [2021-07-13 19:20:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:21,346 INFO L482 AbstractCegarLoop]: Abstraction has 4248 states and 12607 transitions. [2021-07-13 19:20:21,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12607 transitions. [2021-07-13 19:20:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:20:21,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:21,350 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:21,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5056 [2021-07-13 19:20:21,551 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:21,551 INFO L82 PathProgramCache]: Analyzing trace with hash 944530866, now seen corresponding path program 148 times [2021-07-13 19:20:21,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:21,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919523773] [2021-07-13 19:20:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:21,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919523773] [2021-07-13 19:20:21,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919523773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404044196] [2021-07-13 19:20:21,612 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 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 [2021-07-13 19:20:21,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:21,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:20:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:21,972 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-13 19:20:21,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:20:21,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-07-13 19:20:22,759 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 261 [2021-07-13 19:20:23,519 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 304 [2021-07-13 19:20:23,690 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 325 [2021-07-13 19:20:23,964 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-07-13 19:20:24,238 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-07-13 19:20:24,591 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 660 DAG size of output: 479 [2021-07-13 19:20:25,094 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 581 [2021-07-13 19:20:25,888 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 648 [2021-07-13 19:20:26,276 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 467 [2021-07-13 19:20:26,559 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 303 [2021-07-13 19:20:27,203 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 257 [2021-07-13 19:20:27,406 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 329 [2021-07-13 19:20:27,785 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 171 [2021-07-13 19:20:28,507 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 173 [2021-07-13 19:20:29,012 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 269 [2021-07-13 19:20:29,348 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 464 [2021-07-13 19:20:29,949 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 644 [2021-07-13 19:20:30,387 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 547 [2021-07-13 19:20:31,481 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 231 [2021-07-13 19:20:31,639 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 232 [2021-07-13 19:20:32,196 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 275 [2021-07-13 19:20:32,423 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 190 [2021-07-13 19:20:33,062 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 262 [2021-07-13 19:20:33,413 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 348 [2021-07-13 19:20:34,071 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 571 [2021-07-13 19:20:34,821 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 224 [2021-07-13 19:20:35,739 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 357 [2021-07-13 19:20:36,760 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1093 DAG size of output: 799 [2021-07-13 19:20:38,403 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1557 DAG size of output: 1132 [2021-07-13 19:20:38,748 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 453 [2021-07-13 19:20:39,321 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 540 [2021-07-13 19:20:39,921 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 200 [2021-07-13 19:20:40,037 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 216 [2021-07-13 19:20:41,407 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 298 [2021-07-13 19:20:41,663 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 390 [2021-07-13 19:20:42,630 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 598 [2021-07-13 19:20:43,358 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 243 [2021-07-13 19:20:43,509 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 265 [2021-07-13 19:20:43,660 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 288 [2021-07-13 19:20:44,054 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 233 [2021-07-13 19:20:44,623 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 272 [2021-07-13 19:20:44,751 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 275 [2021-07-13 19:20:44,941 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 350 [2021-07-13 19:20:45,229 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 447 [2021-07-13 19:20:45,341 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 237 [2021-07-13 19:20:45,447 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 240 [2021-07-13 19:20:45,977 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-07-13 19:20:46,458 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 727 DAG size of output: 614 [2021-07-13 19:20:47,956 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 910 [2021-07-13 19:20:49,595 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1515 DAG size of output: 1270 [2021-07-13 19:20:51,582 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 1698 DAG size of output: 1431 [2021-07-13 19:20:55,730 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-07-13 19:20:59,876 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-07-13 19:21:04,386 WARN L205 SmtUtils]: Spent 4.50 s on a formula simplification. DAG size of input: 2771 DAG size of output: 2217 [2021-07-13 19:21:05,139 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 2217 DAG size of output: 1860 [2021-07-13 19:21:07,639 WARN L205 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 1349 DAG size of output: 1709 [2021-07-13 19:21:07,896 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 424 [2021-07-13 19:21:08,080 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 280 [2021-07-13 19:21:08,500 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 258 [2021-07-13 19:21:08,924 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 251 [2021-07-13 19:21:09,137 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 263 [2021-07-13 19:21:09,535 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 1145 DAG size of output: 624 [2021-07-13 19:21:10,463 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 580 [2021-07-13 19:21:10,940 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 253 [2021-07-13 19:21:11,381 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 289 [2021-07-13 19:21:11,577 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 371 [2021-07-13 19:21:11,899 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 762 DAG size of output: 476 [2021-07-13 19:21:12,362 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 1117 DAG size of output: 562 [2021-07-13 19:21:12,801 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 491 [2021-07-13 19:21:12,948 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 313 [2021-07-13 19:21:14,076 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 304 [2021-07-13 19:21:14,409 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 461 [2021-07-13 19:21:14,594 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 329 [2021-07-13 19:21:15,572 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 310 [2021-07-13 19:21:15,937 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 496 [2021-07-13 19:21:16,900 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-07-13 19:21:17,864 WARN L205 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-07-13 19:21:18,925 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1845 DAG size of output: 928 [2021-07-13 19:21:20,053 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 930 DAG size of output: 1088 [2021-07-13 19:21:20,375 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 261 [2021-07-13 19:21:21,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:21:21,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:21:21,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:21:21,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-07-13 19:21:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:21,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404044196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:21,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:21,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 19:21:21,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013544221] [2021-07-13 19:21:21,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:21:21,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:21:21,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:21:21,412 INFO L87 Difference]: Start difference. First operand 4248 states and 12607 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:21,710 INFO L93 Difference]: Finished difference Result 4620 states and 13625 transitions. [2021-07-13 19:21:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:21:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:21,716 INFO L225 Difference]: With dead ends: 4620 [2021-07-13 19:21:21,716 INFO L226 Difference]: Without dead ends: 4617 [2021-07-13 19:21:21,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:21:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-07-13 19:21:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4548. [2021-07-13 19:21:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.9762480756542775) internal successors, (13533), 4547 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 13533 transitions. [2021-07-13 19:21:21,771 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 13533 transitions. Word has length 21 [2021-07-13 19:21:21,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:21,771 INFO L482 AbstractCegarLoop]: Abstraction has 4548 states and 13533 transitions. [2021-07-13 19:21:21,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 13533 transitions. [2021-07-13 19:21:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:21,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:21,776 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:21,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7776 [2021-07-13 19:21:21,977 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1973759689, now seen corresponding path program 149 times [2021-07-13 19:21:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:21,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996672908] [2021-07-13 19:21:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:22,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:22,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996672908] [2021-07-13 19:21:22,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996672908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:22,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461155223] [2021-07-13 19:21:22,063 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 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 [2021-07-13 19:21:22,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:21:22,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:22,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:22,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461155223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:22,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:22,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:21:22,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948410265] [2021-07-13 19:21:22,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:21:22,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:21:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:21:22,131 INFO L87 Difference]: Start difference. First operand 4548 states and 13533 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:22,435 INFO L93 Difference]: Finished difference Result 4872 states and 14053 transitions. [2021-07-13 19:21:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:21:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:22,442 INFO L225 Difference]: With dead ends: 4872 [2021-07-13 19:21:22,442 INFO L226 Difference]: Without dead ends: 4863 [2021-07-13 19:21:22,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:21:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-07-13 19:21:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4581. [2021-07-13 19:21:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.9753275109170305) internal successors, (13627), 4580 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 13627 transitions. [2021-07-13 19:21:22,513 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 13627 transitions. Word has length 22 [2021-07-13 19:21:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:22,513 INFO L482 AbstractCegarLoop]: Abstraction has 4581 states and 13627 transitions. [2021-07-13 19:21:22,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 13627 transitions. [2021-07-13 19:21:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:22,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:22,519 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:22,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9859,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:22,742 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash 510781845, now seen corresponding path program 150 times [2021-07-13 19:21:22,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:22,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833138572] [2021-07-13 19:21:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:22,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:22,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833138572] [2021-07-13 19:21:22,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833138572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:22,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296904155] [2021-07-13 19:21:22,816 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 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 [2021-07-13 19:21:22,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:21:22,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:22,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296904155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:22,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:22,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:22,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714176915] [2021-07-13 19:21:22,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:22,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:22,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:22,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:22,896 INFO L87 Difference]: Start difference. First operand 4581 states and 13627 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:22,964 INFO L93 Difference]: Finished difference Result 5002 states and 14452 transitions. [2021-07-13 19:21:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:21:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:22,970 INFO L225 Difference]: With dead ends: 5002 [2021-07-13 19:21:22,970 INFO L226 Difference]: Without dead ends: 5002 [2021-07-13 19:21:22,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2021-07-13 19:21:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4539. [2021-07-13 19:21:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 2.9726751873071837) internal successors, (13490), 4538 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 13490 transitions. [2021-07-13 19:21:23,036 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 13490 transitions. Word has length 22 [2021-07-13 19:21:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:23,036 INFO L482 AbstractCegarLoop]: Abstraction has 4539 states and 13490 transitions. [2021-07-13 19:21:23,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 13490 transitions. [2021-07-13 19:21:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:23,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:23,041 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:23,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9860 [2021-07-13 19:21:23,241 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1655986249, now seen corresponding path program 151 times [2021-07-13 19:21:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:23,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854890888] [2021-07-13 19:21:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:23,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854890888] [2021-07-13 19:21:23,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854890888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987147830] [2021-07-13 19:21:23,308 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 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 [2021-07-13 19:21:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:23,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987147830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:23,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:23,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:23,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165252289] [2021-07-13 19:21:23,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:23,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:23,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:23,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:23,367 INFO L87 Difference]: Start difference. First operand 4539 states and 13490 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:23,531 INFO L93 Difference]: Finished difference Result 4827 states and 13939 transitions. [2021-07-13 19:21:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:23,538 INFO L225 Difference]: With dead ends: 4827 [2021-07-13 19:21:23,538 INFO L226 Difference]: Without dead ends: 4825 [2021-07-13 19:21:23,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:21:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-07-13 19:21:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4570. [2021-07-13 19:21:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.9739549135478223) internal successors, (13588), 4569 states have internal predecessors, (13588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13588 transitions. [2021-07-13 19:21:23,605 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13588 transitions. Word has length 22 [2021-07-13 19:21:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:23,605 INFO L482 AbstractCegarLoop]: Abstraction has 4570 states and 13588 transitions. [2021-07-13 19:21:23,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13588 transitions. [2021-07-13 19:21:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:23,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:23,610 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:23,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9861,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:23,811 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -921231987, now seen corresponding path program 152 times [2021-07-13 19:21:23,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:23,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731038549] [2021-07-13 19:21:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:23,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:23,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731038549] [2021-07-13 19:21:23,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731038549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:23,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596453889] [2021-07-13 19:21:23,875 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 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 [2021-07-13 19:21:23,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:23,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:23,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596453889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:23,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:23,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367924382] [2021-07-13 19:21:23,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:23,946 INFO L87 Difference]: Start difference. First operand 4570 states and 13588 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:24,024 INFO L93 Difference]: Finished difference Result 5088 states and 14673 transitions. [2021-07-13 19:21:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:21:24,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:24,031 INFO L225 Difference]: With dead ends: 5088 [2021-07-13 19:21:24,031 INFO L226 Difference]: Without dead ends: 5088 [2021-07-13 19:21:24,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-07-13 19:21:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4572. [2021-07-13 19:21:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 2.9739663093415007) internal successors, (13594), 4571 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13594 transitions. [2021-07-13 19:21:24,088 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13594 transitions. Word has length 22 [2021-07-13 19:21:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:24,088 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 13594 transitions. [2021-07-13 19:21:24,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13594 transitions. [2021-07-13 19:21:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:24,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:24,092 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:24,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9862 [2021-07-13 19:21:24,293 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1644687975, now seen corresponding path program 153 times [2021-07-13 19:21:24,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:24,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603167596] [2021-07-13 19:21:24,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:24,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:24,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603167596] [2021-07-13 19:21:24,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603167596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:24,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946819792] [2021-07-13 19:21:24,378 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 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 [2021-07-13 19:21:24,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:21:24,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:24,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:24,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946819792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:24,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:24,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:21:24,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816131960] [2021-07-13 19:21:24,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:24,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:24,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:24,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:24,451 INFO L87 Difference]: Start difference. First operand 4572 states and 13594 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:24,574 INFO L93 Difference]: Finished difference Result 5431 states and 15640 transitions. [2021-07-13 19:21:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:24,581 INFO L225 Difference]: With dead ends: 5431 [2021-07-13 19:21:24,581 INFO L226 Difference]: Without dead ends: 5431 [2021-07-13 19:21:24,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:21:24,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-07-13 19:21:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4529. [2021-07-13 19:21:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 2.9712897526501765) internal successors, (13454), 4528 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 13454 transitions. [2021-07-13 19:21:24,644 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 13454 transitions. Word has length 22 [2021-07-13 19:21:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:24,644 INFO L482 AbstractCegarLoop]: Abstraction has 4529 states and 13454 transitions. [2021-07-13 19:21:24,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 13454 transitions. [2021-07-13 19:21:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:24,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:24,649 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:24,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9863 [2021-07-13 19:21:24,849 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash 213230417, now seen corresponding path program 154 times [2021-07-13 19:21:24,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:24,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979212397] [2021-07-13 19:21:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:24,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:24,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979212397] [2021-07-13 19:21:24,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979212397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:24,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137015515] [2021-07-13 19:21:24,909 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 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 [2021-07-13 19:21:24,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:24,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:24,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:24,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137015515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:24,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:24,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:24,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873690314] [2021-07-13 19:21:24,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:24,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:24,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:24,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:24,969 INFO L87 Difference]: Start difference. First operand 4529 states and 13454 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:25,172 INFO L93 Difference]: Finished difference Result 4816 states and 13905 transitions. [2021-07-13 19:21:25,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:25,172 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:25,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:25,179 INFO L225 Difference]: With dead ends: 4816 [2021-07-13 19:21:25,179 INFO L226 Difference]: Without dead ends: 4814 [2021-07-13 19:21:25,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:21:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-07-13 19:21:25,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4562. [2021-07-13 19:21:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.9723744792808593) internal successors, (13557), 4561 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 13557 transitions. [2021-07-13 19:21:25,244 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 13557 transitions. Word has length 22 [2021-07-13 19:21:25,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:25,244 INFO L482 AbstractCegarLoop]: Abstraction has 4562 states and 13557 transitions. [2021-07-13 19:21:25,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 13557 transitions. [2021-07-13 19:21:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:25,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:25,249 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:25,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9864,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:25,449 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:25,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1930979477, now seen corresponding path program 155 times [2021-07-13 19:21:25,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:25,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840658161] [2021-07-13 19:21:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:25,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:25,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840658161] [2021-07-13 19:21:25,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840658161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:25,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846866607] [2021-07-13 19:21:25,512 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 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 [2021-07-13 19:21:25,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:21:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:25,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:25,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846866607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:25,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:25,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:25,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831685081] [2021-07-13 19:21:25,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:25,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:25,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:25,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:25,579 INFO L87 Difference]: Start difference. First operand 4562 states and 13557 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:25,653 INFO L93 Difference]: Finished difference Result 5117 states and 14760 transitions. [2021-07-13 19:21:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:21:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:25,660 INFO L225 Difference]: With dead ends: 5117 [2021-07-13 19:21:25,660 INFO L226 Difference]: Without dead ends: 5117 [2021-07-13 19:21:25,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-13 19:21:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4563. [2021-07-13 19:21:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.9723805348531345) internal successors, (13560), 4562 states have internal predecessors, (13560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 13560 transitions. [2021-07-13 19:21:25,724 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 13560 transitions. Word has length 22 [2021-07-13 19:21:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:25,724 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 13560 transitions. [2021-07-13 19:21:25,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 13560 transitions. [2021-07-13 19:21:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:25,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:25,728 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:25,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9865 [2021-07-13 19:21:25,929 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash 201932143, now seen corresponding path program 156 times [2021-07-13 19:21:25,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:25,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407148324] [2021-07-13 19:21:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:25,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:25,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407148324] [2021-07-13 19:21:25,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407148324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:25,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923315642] [2021-07-13 19:21:25,991 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 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 [2021-07-13 19:21:26,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:21:26,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:26,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:26,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923315642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:26,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:26,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:21:26,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042666582] [2021-07-13 19:21:26,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:26,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:26,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:26,065 INFO L87 Difference]: Start difference. First operand 4563 states and 13560 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:26,166 INFO L93 Difference]: Finished difference Result 5624 states and 16198 transitions. [2021-07-13 19:21:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:26,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:26,175 INFO L225 Difference]: With dead ends: 5624 [2021-07-13 19:21:26,175 INFO L226 Difference]: Without dead ends: 5624 [2021-07-13 19:21:26,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:21:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-07-13 19:21:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 4520. [2021-07-13 19:21:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.969240982518256) internal successors, (13418), 4519 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13418 transitions. [2021-07-13 19:21:26,246 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13418 transitions. Word has length 22 [2021-07-13 19:21:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:26,246 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 13418 transitions. [2021-07-13 19:21:26,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13418 transitions. [2021-07-13 19:21:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:26,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:26,251 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:26,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9866,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:26,452 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1858927659, now seen corresponding path program 157 times [2021-07-13 19:21:26,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:26,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158677004] [2021-07-13 19:21:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:26,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:26,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158677004] [2021-07-13 19:21:26,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158677004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:26,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829498416] [2021-07-13 19:21:26,515 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 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 [2021-07-13 19:21:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:26,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829498416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:26,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:26,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:21:26,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761341812] [2021-07-13 19:21:26,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:26,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:26,591 INFO L87 Difference]: Start difference. First operand 4520 states and 13418 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:26,724 INFO L93 Difference]: Finished difference Result 7402 states and 21575 transitions. [2021-07-13 19:21:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:21:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:26,735 INFO L225 Difference]: With dead ends: 7402 [2021-07-13 19:21:26,735 INFO L226 Difference]: Without dead ends: 7402 [2021-07-13 19:21:26,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-07-13 19:21:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 6132. [2021-07-13 19:21:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.9955961507095092) internal successors, (18366), 6131 states have internal predecessors, (18366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 18366 transitions. [2021-07-13 19:21:26,830 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 18366 transitions. Word has length 22 [2021-07-13 19:21:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:26,830 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 18366 transitions. [2021-07-13 19:21:26,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 18366 transitions. [2021-07-13 19:21:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:26,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:26,836 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:27,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9867 [2021-07-13 19:21:27,037 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:27,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:27,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1562527415, now seen corresponding path program 158 times [2021-07-13 19:21:27,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:27,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974961168] [2021-07-13 19:21:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:27,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:27,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974961168] [2021-07-13 19:21:27,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974961168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:27,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223757556] [2021-07-13 19:21:27,093 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 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 [2021-07-13 19:21:27,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:27,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:27,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:27,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223757556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:27,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:27,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:27,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593861212] [2021-07-13 19:21:27,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:27,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:27,155 INFO L87 Difference]: Start difference. First operand 6132 states and 18366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:27,320 INFO L93 Difference]: Finished difference Result 6467 states and 18987 transitions. [2021-07-13 19:21:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:27,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:27,329 INFO L225 Difference]: With dead ends: 6467 [2021-07-13 19:21:27,329 INFO L226 Difference]: Without dead ends: 6465 [2021-07-13 19:21:27,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:21:27,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-07-13 19:21:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6222. [2021-07-13 19:21:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.9975888120880887) internal successors, (18648), 6221 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 18648 transitions. [2021-07-13 19:21:27,419 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 18648 transitions. Word has length 22 [2021-07-13 19:21:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:27,419 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 18648 transitions. [2021-07-13 19:21:27,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 18648 transitions. [2021-07-13 19:21:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:27,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:27,425 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:27,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9868,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:27,626 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash 155221645, now seen corresponding path program 159 times [2021-07-13 19:21:27,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:27,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35981647] [2021-07-13 19:21:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:27,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:27,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35981647] [2021-07-13 19:21:27,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35981647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:27,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326743937] [2021-07-13 19:21:27,698 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 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 [2021-07-13 19:21:27,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:21:27,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:27,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:27,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326743937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:27,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:27,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:27,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065693940] [2021-07-13 19:21:27,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:27,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:27,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:27,773 INFO L87 Difference]: Start difference. First operand 6222 states and 18648 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:27,847 INFO L93 Difference]: Finished difference Result 6454 states and 18938 transitions. [2021-07-13 19:21:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:21:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:27,856 INFO L225 Difference]: With dead ends: 6454 [2021-07-13 19:21:27,856 INFO L226 Difference]: Without dead ends: 6454 [2021-07-13 19:21:27,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-07-13 19:21:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6210. [2021-07-13 19:21:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.995490417136415) internal successors, (18599), 6209 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 18599 transitions. [2021-07-13 19:21:27,946 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 18599 transitions. Word has length 22 [2021-07-13 19:21:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:27,946 INFO L482 AbstractCegarLoop]: Abstraction has 6210 states and 18599 transitions. [2021-07-13 19:21:27,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 18599 transitions. [2021-07-13 19:21:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:27,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:27,952 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:28,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9869,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:28,152 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1573825689, now seen corresponding path program 160 times [2021-07-13 19:21:28,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:28,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127482430] [2021-07-13 19:21:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:28,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127482430] [2021-07-13 19:21:28,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127482430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990660228] [2021-07-13 19:21:28,256 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 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 [2021-07-13 19:21:28,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:28,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:28,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:28,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:28,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990660228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:28,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:28,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:28,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108617122] [2021-07-13 19:21:28,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:28,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:28,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:28,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:28,322 INFO L87 Difference]: Start difference. First operand 6210 states and 18599 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:28,420 INFO L93 Difference]: Finished difference Result 7159 states and 20967 transitions. [2021-07-13 19:21:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:21:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:28,430 INFO L225 Difference]: With dead ends: 7159 [2021-07-13 19:21:28,430 INFO L226 Difference]: Without dead ends: 7159 [2021-07-13 19:21:28,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:21:28,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7159 states. [2021-07-13 19:21:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7159 to 6221. [2021-07-13 19:21:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 2.995498392282958) internal successors, (18632), 6220 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 18632 transitions. [2021-07-13 19:21:28,546 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 18632 transitions. Word has length 22 [2021-07-13 19:21:28,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:28,546 INFO L482 AbstractCegarLoop]: Abstraction has 6221 states and 18632 transitions. [2021-07-13 19:21:28,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 18632 transitions. [2021-07-13 19:21:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:28,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:28,552 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:28,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:28,752 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:28,753 INFO L82 PathProgramCache]: Analyzing trace with hash 660281805, now seen corresponding path program 161 times [2021-07-13 19:21:28,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:28,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251109496] [2021-07-13 19:21:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:28,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:28,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251109496] [2021-07-13 19:21:28,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251109496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:28,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917797516] [2021-07-13 19:21:28,820 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 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 [2021-07-13 19:21:28,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:21:28,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:28,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:28,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:28,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917797516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:28,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:28,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:28,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230013467] [2021-07-13 19:21:28,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:28,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:28,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:28,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:28,886 INFO L87 Difference]: Start difference. First operand 6221 states and 18632 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:28,999 INFO L93 Difference]: Finished difference Result 10072 states and 29921 transitions. [2021-07-13 19:21:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:21:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:29,016 INFO L225 Difference]: With dead ends: 10072 [2021-07-13 19:21:29,016 INFO L226 Difference]: Without dead ends: 10072 [2021-07-13 19:21:29,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:21:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-07-13 19:21:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9194. [2021-07-13 19:21:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.024583922549766) internal successors, (27805), 9193 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 27805 transitions. [2021-07-13 19:21:29,160 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 27805 transitions. Word has length 22 [2021-07-13 19:21:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:29,160 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 27805 transitions. [2021-07-13 19:21:29,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 27805 transitions. [2021-07-13 19:21:29,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:29,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:29,169 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:29,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9871,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:29,369 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:29,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1198137383, now seen corresponding path program 162 times [2021-07-13 19:21:29,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:29,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16744722] [2021-07-13 19:21:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:29,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:29,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16744722] [2021-07-13 19:21:29,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16744722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:29,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814835685] [2021-07-13 19:21:29,444 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 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 [2021-07-13 19:21:29,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:21:29,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:29,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:29,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814835685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:29,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:29,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:29,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868746334] [2021-07-13 19:21:29,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:29,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:29,511 INFO L87 Difference]: Start difference. First operand 9194 states and 27805 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:29,687 INFO L93 Difference]: Finished difference Result 13143 states and 39385 transitions. [2021-07-13 19:21:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:21:29,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:29,711 INFO L225 Difference]: With dead ends: 13143 [2021-07-13 19:21:29,711 INFO L226 Difference]: Without dead ends: 13143 [2021-07-13 19:21:29,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:21:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-07-13 19:21:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 11491. [2021-07-13 19:21:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 3.0464751958224543) internal successors, (35004), 11490 states have internal predecessors, (35004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 35004 transitions. [2021-07-13 19:21:29,918 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 35004 transitions. Word has length 22 [2021-07-13 19:21:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:29,919 INFO L482 AbstractCegarLoop]: Abstraction has 11491 states and 35004 transitions. [2021-07-13 19:21:29,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 35004 transitions. [2021-07-13 19:21:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:29,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:29,929 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:30,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9872 [2021-07-13 19:21:30,130 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:30,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1940843115, now seen corresponding path program 163 times [2021-07-13 19:21:30,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:30,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178403546] [2021-07-13 19:21:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:21:30,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:30,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178403546] [2021-07-13 19:21:30,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178403546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:30,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705858925] [2021-07-13 19:21:30,188 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 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 [2021-07-13 19:21:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:21:30,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705858925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:30,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:30,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:21:30,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870845366] [2021-07-13 19:21:30,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:21:30,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:30,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:21:30,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:21:30,247 INFO L87 Difference]: Start difference. First operand 11491 states and 35004 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:30,415 INFO L93 Difference]: Finished difference Result 12000 states and 36264 transitions. [2021-07-13 19:21:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:21:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:30,433 INFO L225 Difference]: With dead ends: 12000 [2021-07-13 19:21:30,433 INFO L226 Difference]: Without dead ends: 11996 [2021-07-13 19:21:30,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-07-13 19:21:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 11808. [2021-07-13 19:21:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11807 states have (on average 3.0505632252053867) internal successors, (36018), 11807 states have internal predecessors, (36018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 36018 transitions. [2021-07-13 19:21:30,609 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 36018 transitions. Word has length 22 [2021-07-13 19:21:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:30,609 INFO L482 AbstractCegarLoop]: Abstraction has 11808 states and 36018 transitions. [2021-07-13 19:21:30,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 36018 transitions. [2021-07-13 19:21:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:30,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:30,620 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:30,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9873 [2021-07-13 19:21:30,820 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash 469575189, now seen corresponding path program 164 times [2021-07-13 19:21:30,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:30,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100251400] [2021-07-13 19:21:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:30,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:30,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100251400] [2021-07-13 19:21:30,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100251400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:30,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927812842] [2021-07-13 19:21:30,886 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 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 [2021-07-13 19:21:30,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:30,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927812842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:30,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:30,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:30,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593852374] [2021-07-13 19:21:30,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:30,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:30,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:30,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:30,951 INFO L87 Difference]: Start difference. First operand 11808 states and 36018 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:31,097 INFO L93 Difference]: Finished difference Result 14397 states and 43404 transitions. [2021-07-13 19:21:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:21:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:31,124 INFO L225 Difference]: With dead ends: 14397 [2021-07-13 19:21:31,124 INFO L226 Difference]: Without dead ends: 14397 [2021-07-13 19:21:31,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:21:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-07-13 19:21:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 12614. [2021-07-13 19:21:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 3.0629509236502024) internal successors, (38633), 12613 states have internal predecessors, (38633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 38633 transitions. [2021-07-13 19:21:31,408 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 38633 transitions. Word has length 22 [2021-07-13 19:21:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:31,408 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 38633 transitions. [2021-07-13 19:21:31,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 38633 transitions. [2021-07-13 19:21:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:31,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:31,419 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:31,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9874,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:31,620 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash -36771077, now seen corresponding path program 165 times [2021-07-13 19:21:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:31,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876518107] [2021-07-13 19:21:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:31,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:31,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876518107] [2021-07-13 19:21:31,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876518107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:31,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514830291] [2021-07-13 19:21:31,696 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 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 [2021-07-13 19:21:31,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:21:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514830291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:31,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:31,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:31,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196912045] [2021-07-13 19:21:31,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:31,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:31,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:31,780 INFO L87 Difference]: Start difference. First operand 12614 states and 38633 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:31,928 INFO L93 Difference]: Finished difference Result 15242 states and 46024 transitions. [2021-07-13 19:21:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:21:31,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:31,956 INFO L225 Difference]: With dead ends: 15242 [2021-07-13 19:21:31,956 INFO L226 Difference]: Without dead ends: 15242 [2021-07-13 19:21:31,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2021-07-13 19:21:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 6456. [2021-07-13 19:21:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 3.013787761425252) internal successors, (19454), 6455 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19454 transitions. [2021-07-13 19:21:32,120 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19454 transitions. Word has length 22 [2021-07-13 19:21:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:32,121 INFO L482 AbstractCegarLoop]: Abstraction has 6456 states and 19454 transitions. [2021-07-13 19:21:32,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19454 transitions. [2021-07-13 19:21:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:32,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:32,127 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:32,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9875 [2021-07-13 19:21:32,327 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash 501084501, now seen corresponding path program 166 times [2021-07-13 19:21:32,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:32,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673207927] [2021-07-13 19:21:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:32,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:32,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673207927] [2021-07-13 19:21:32,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673207927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:32,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003085063] [2021-07-13 19:21:32,415 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 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 [2021-07-13 19:21:32,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:32,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:32,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:32,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003085063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:32,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:32,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:32,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987545228] [2021-07-13 19:21:32,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:32,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:32,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:32,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:32,480 INFO L87 Difference]: Start difference. First operand 6456 states and 19454 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:32,645 INFO L93 Difference]: Finished difference Result 9785 states and 29004 transitions. [2021-07-13 19:21:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:21:32,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:32,665 INFO L225 Difference]: With dead ends: 9785 [2021-07-13 19:21:32,665 INFO L226 Difference]: Without dead ends: 9785 [2021-07-13 19:21:32,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:21:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-07-13 19:21:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 6500. [2021-07-13 19:21:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 3.014002154177566) internal successors, (19588), 6499 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 19588 transitions. [2021-07-13 19:21:32,789 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 19588 transitions. Word has length 22 [2021-07-13 19:21:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:32,789 INFO L482 AbstractCegarLoop]: Abstraction has 6500 states and 19588 transitions. [2021-07-13 19:21:32,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 19588 transitions. [2021-07-13 19:21:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:32,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:32,795 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:32,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9876,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:32,996 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:32,996 INFO L82 PathProgramCache]: Analyzing trace with hash -776445359, now seen corresponding path program 167 times [2021-07-13 19:21:32,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:32,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446428988] [2021-07-13 19:21:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:33,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:33,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446428988] [2021-07-13 19:21:33,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446428988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:33,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011561495] [2021-07-13 19:21:33,050 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 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 [2021-07-13 19:21:33,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:21:33,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:33,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:33,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011561495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:33,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:33,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:33,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065141641] [2021-07-13 19:21:33,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:33,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:33,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:33,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:33,119 INFO L87 Difference]: Start difference. First operand 6500 states and 19588 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:33,288 INFO L93 Difference]: Finished difference Result 6765 states and 19991 transitions. [2021-07-13 19:21:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:33,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:33,299 INFO L225 Difference]: With dead ends: 6765 [2021-07-13 19:21:33,299 INFO L226 Difference]: Without dead ends: 6761 [2021-07-13 19:21:33,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:21:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-07-13 19:21:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6403. [2021-07-13 19:21:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6403 states, 6402 states have (on average 3.009215870040612) internal successors, (19265), 6402 states have internal predecessors, (19265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 19265 transitions. [2021-07-13 19:21:33,393 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 19265 transitions. Word has length 22 [2021-07-13 19:21:33,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:33,393 INFO L482 AbstractCegarLoop]: Abstraction has 6403 states and 19265 transitions. [2021-07-13 19:21:33,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 19265 transitions. [2021-07-13 19:21:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:33,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:33,399 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:33,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9877 [2021-07-13 19:21:33,600 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 941303701, now seen corresponding path program 168 times [2021-07-13 19:21:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:33,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309579658] [2021-07-13 19:21:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:33,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:33,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309579658] [2021-07-13 19:21:33,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309579658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:33,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18352680] [2021-07-13 19:21:33,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:21:33,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:21:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:33,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18352680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:33,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:33,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655498467] [2021-07-13 19:21:33,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:33,755 INFO L87 Difference]: Start difference. First operand 6403 states and 19265 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:33,859 INFO L93 Difference]: Finished difference Result 6899 states and 20313 transitions. [2021-07-13 19:21:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:21:33,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:33,874 INFO L225 Difference]: With dead ends: 6899 [2021-07-13 19:21:33,874 INFO L226 Difference]: Without dead ends: 6899 [2021-07-13 19:21:33,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:33,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-07-13 19:21:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6402. [2021-07-13 19:21:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 3.0073426027183254) internal successors, (19250), 6401 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 19250 transitions. [2021-07-13 19:21:34,015 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 19250 transitions. Word has length 22 [2021-07-13 19:21:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:34,015 INFO L482 AbstractCegarLoop]: Abstraction has 6402 states and 19250 transitions. [2021-07-13 19:21:34,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 19250 transitions. [2021-07-13 19:21:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:34,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:34,024 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:34,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9878,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:34,246 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash -787743633, now seen corresponding path program 169 times [2021-07-13 19:21:34,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:34,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271804645] [2021-07-13 19:21:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:34,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:34,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271804645] [2021-07-13 19:21:34,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271804645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:34,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152712971] [2021-07-13 19:21:34,312 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 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 [2021-07-13 19:21:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:34,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:34,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152712971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:34,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:34,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:21:34,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264441250] [2021-07-13 19:21:34,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:34,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:34,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:34,392 INFO L87 Difference]: Start difference. First operand 6402 states and 19250 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:34,507 INFO L93 Difference]: Finished difference Result 6620 states and 19508 transitions. [2021-07-13 19:21:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:21:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:34,516 INFO L225 Difference]: With dead ends: 6620 [2021-07-13 19:21:34,516 INFO L226 Difference]: Without dead ends: 6620 [2021-07-13 19:21:34,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:21:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-07-13 19:21:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6370. [2021-07-13 19:21:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.004396294551735) internal successors, (19135), 6369 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 19135 transitions. [2021-07-13 19:21:34,610 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 19135 transitions. Word has length 22 [2021-07-13 19:21:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:34,610 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 19135 transitions. [2021-07-13 19:21:34,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 19135 transitions. [2021-07-13 19:21:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:34,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:34,616 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:34,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9879,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:34,817 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1446363861, now seen corresponding path program 170 times [2021-07-13 19:21:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773502631] [2021-07-13 19:21:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:34,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:34,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773502631] [2021-07-13 19:21:34,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773502631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:34,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394315247] [2021-07-13 19:21:34,880 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 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 [2021-07-13 19:21:34,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:34,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394315247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:34,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:34,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:21:34,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680128402] [2021-07-13 19:21:34,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:34,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:34,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:34,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:34,950 INFO L87 Difference]: Start difference. First operand 6370 states and 19135 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:35,064 INFO L93 Difference]: Finished difference Result 7662 states and 22542 transitions. [2021-07-13 19:21:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:35,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:35,076 INFO L225 Difference]: With dead ends: 7662 [2021-07-13 19:21:35,076 INFO L226 Difference]: Without dead ends: 7662 [2021-07-13 19:21:35,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-07-13 19:21:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6264. [2021-07-13 19:21:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 2.9996806642184257) internal successors, (18787), 6263 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 18787 transitions. [2021-07-13 19:21:35,168 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 18787 transitions. Word has length 22 [2021-07-13 19:21:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:35,168 INFO L482 AbstractCegarLoop]: Abstraction has 6264 states and 18787 transitions. [2021-07-13 19:21:35,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 18787 transitions. [2021-07-13 19:21:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:35,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:35,174 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:35,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9880,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:35,374 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:35,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1984219439, now seen corresponding path program 171 times [2021-07-13 19:21:35,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:35,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742069206] [2021-07-13 19:21:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:35,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:35,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742069206] [2021-07-13 19:21:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742069206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:35,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470660313] [2021-07-13 19:21:35,452 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 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 [2021-07-13 19:21:35,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:21:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:35,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470660313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:35,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:35,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:21:35,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317584926] [2021-07-13 19:21:35,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:35,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:35,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:35,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:35,543 INFO L87 Difference]: Start difference. First operand 6264 states and 18787 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:35,707 INFO L93 Difference]: Finished difference Result 9995 states and 29712 transitions. [2021-07-13 19:21:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:21:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:35,727 INFO L225 Difference]: With dead ends: 9995 [2021-07-13 19:21:35,727 INFO L226 Difference]: Without dead ends: 9995 [2021-07-13 19:21:35,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:21:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-07-13 19:21:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 7256. [2021-07-13 19:21:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0132322536181944) internal successors, (21861), 7255 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21861 transitions. [2021-07-13 19:21:35,857 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21861 transitions. Word has length 22 [2021-07-13 19:21:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:35,857 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21861 transitions. [2021-07-13 19:21:35,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21861 transitions. [2021-07-13 19:21:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:35,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:35,863 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:36,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9881 [2021-07-13 19:21:36,064 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:36,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1477873173, now seen corresponding path program 172 times [2021-07-13 19:21:36,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:36,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672788536] [2021-07-13 19:21:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:36,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672788536] [2021-07-13 19:21:36,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672788536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490057767] [2021-07-13 19:21:36,136 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 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 [2021-07-13 19:21:36,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:36,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:36,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490057767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:36,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:36,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:21:36,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745666849] [2021-07-13 19:21:36,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:36,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:36,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:36,208 INFO L87 Difference]: Start difference. First operand 7256 states and 21861 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:36,421 INFO L93 Difference]: Finished difference Result 11660 states and 34640 transitions. [2021-07-13 19:21:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:36,438 INFO L225 Difference]: With dead ends: 11660 [2021-07-13 19:21:36,438 INFO L226 Difference]: Without dead ends: 11660 [2021-07-13 19:21:36,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:21:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-07-13 19:21:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 9258. [2021-07-13 19:21:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9258 states, 9257 states have (on average 3.0371610673004215) internal successors, (28115), 9257 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9258 states to 9258 states and 28115 transitions. [2021-07-13 19:21:36,602 INFO L78 Accepts]: Start accepts. Automaton has 9258 states and 28115 transitions. Word has length 22 [2021-07-13 19:21:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:36,602 INFO L482 AbstractCegarLoop]: Abstraction has 9258 states and 28115 transitions. [2021-07-13 19:21:36,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 9258 states and 28115 transitions. [2021-07-13 19:21:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:36,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:36,611 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:36,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9882,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:36,812 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2074645977, now seen corresponding path program 173 times [2021-07-13 19:21:36,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:36,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286753031] [2021-07-13 19:21:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:21:36,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286753031] [2021-07-13 19:21:36,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286753031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103864425] [2021-07-13 19:21:36,857 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 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 [2021-07-13 19:21:36,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:21:36,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:36,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:21:36,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103864425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:36,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:36,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:21:36,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880616908] [2021-07-13 19:21:36,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:21:36,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:21:36,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:21:36,924 INFO L87 Difference]: Start difference. First operand 9258 states and 28115 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:37,080 INFO L93 Difference]: Finished difference Result 9612 states and 28912 transitions. [2021-07-13 19:21:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:21:37,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:37,096 INFO L225 Difference]: With dead ends: 9612 [2021-07-13 19:21:37,096 INFO L226 Difference]: Without dead ends: 9608 [2021-07-13 19:21:37,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:21:37,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-07-13 19:21:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9445. [2021-07-13 19:21:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.039919525624735) internal successors, (28709), 9444 states have internal predecessors, (28709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 28709 transitions. [2021-07-13 19:21:37,245 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 28709 transitions. Word has length 22 [2021-07-13 19:21:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:37,245 INFO L482 AbstractCegarLoop]: Abstraction has 9445 states and 28709 transitions. [2021-07-13 19:21:37,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 28709 transitions. [2021-07-13 19:21:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:37,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:37,254 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:37,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9883 [2021-07-13 19:21:37,455 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 367281639, now seen corresponding path program 174 times [2021-07-13 19:21:37,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:37,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946966795] [2021-07-13 19:21:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:37,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946966795] [2021-07-13 19:21:37,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946966795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945885523] [2021-07-13 19:21:37,519 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 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 [2021-07-13 19:21:37,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:21:37,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:37,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:37,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945885523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:37,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:37,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:37,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955265266] [2021-07-13 19:21:37,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:37,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:37,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:37,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:37,586 INFO L87 Difference]: Start difference. First operand 9445 states and 28709 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:37,789 INFO L93 Difference]: Finished difference Result 12460 states and 37247 transitions. [2021-07-13 19:21:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:21:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:37,810 INFO L225 Difference]: With dead ends: 12460 [2021-07-13 19:21:37,810 INFO L226 Difference]: Without dead ends: 12460 [2021-07-13 19:21:37,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:21:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-07-13 19:21:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 9999. [2021-07-13 19:21:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 3.049109821964393) internal successors, (30485), 9998 states have internal predecessors, (30485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 30485 transitions. [2021-07-13 19:21:37,988 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 30485 transitions. Word has length 22 [2021-07-13 19:21:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:37,988 INFO L482 AbstractCegarLoop]: Abstraction has 9999 states and 30485 transitions. [2021-07-13 19:21:37,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 30485 transitions. [2021-07-13 19:21:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:37,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:37,998 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:38,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9884 [2021-07-13 19:21:38,198 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1850416577, now seen corresponding path program 175 times [2021-07-13 19:21:38,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:38,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613060424] [2021-07-13 19:21:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:38,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:38,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613060424] [2021-07-13 19:21:38,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613060424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:38,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533296750] [2021-07-13 19:21:38,281 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 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 [2021-07-13 19:21:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:38,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:38,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533296750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:38,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:38,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:21:38,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124653510] [2021-07-13 19:21:38,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:38,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:38,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:38,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:38,369 INFO L87 Difference]: Start difference. First operand 9999 states and 30485 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:38,566 INFO L93 Difference]: Finished difference Result 12909 states and 38690 transitions. [2021-07-13 19:21:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:21:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:38,600 INFO L225 Difference]: With dead ends: 12909 [2021-07-13 19:21:38,600 INFO L226 Difference]: Without dead ends: 12909 [2021-07-13 19:21:38,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:21:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-07-13 19:21:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 6060. [2021-07-13 19:21:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 3.0120481927710845) internal successors, (18250), 6059 states have internal predecessors, (18250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 18250 transitions. [2021-07-13 19:21:38,788 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 18250 transitions. Word has length 22 [2021-07-13 19:21:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:38,788 INFO L482 AbstractCegarLoop]: Abstraction has 6060 states and 18250 transitions. [2021-07-13 19:21:38,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 18250 transitions. [2021-07-13 19:21:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:38,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:38,797 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:39,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9885 [2021-07-13 19:21:39,013 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:39,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1344070311, now seen corresponding path program 176 times [2021-07-13 19:21:39,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:39,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998106741] [2021-07-13 19:21:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:39,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:39,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998106741] [2021-07-13 19:21:39,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998106741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:39,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80740237] [2021-07-13 19:21:39,079 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 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 [2021-07-13 19:21:39,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:39,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:39,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80740237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:39,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:39,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:21:39,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236089096] [2021-07-13 19:21:39,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:39,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:39,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:39,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:39,151 INFO L87 Difference]: Start difference. First operand 6060 states and 18250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:39,371 INFO L93 Difference]: Finished difference Result 9798 states and 28894 transitions. [2021-07-13 19:21:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:39,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:39,386 INFO L225 Difference]: With dead ends: 9798 [2021-07-13 19:21:39,386 INFO L226 Difference]: Without dead ends: 9798 [2021-07-13 19:21:39,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:21:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-07-13 19:21:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5868. [2021-07-13 19:21:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.0093744673598093) internal successors, (17656), 5867 states have internal predecessors, (17656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 17656 transitions. [2021-07-13 19:21:39,498 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 17656 transitions. Word has length 22 [2021-07-13 19:21:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:39,498 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 17656 transitions. [2021-07-13 19:21:39,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 17656 transitions. [2021-07-13 19:21:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:39,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:39,503 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:39,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9886 [2021-07-13 19:21:39,704 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2117261897, now seen corresponding path program 177 times [2021-07-13 19:21:39,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:39,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55059079] [2021-07-13 19:21:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:39,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:39,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55059079] [2021-07-13 19:21:39,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55059079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:39,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100728373] [2021-07-13 19:21:39,759 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 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 [2021-07-13 19:21:39,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:21:39,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:39,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100728373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:39,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:39,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:39,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809861613] [2021-07-13 19:21:39,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:39,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:39,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:39,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:39,824 INFO L87 Difference]: Start difference. First operand 5868 states and 17656 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:39,979 INFO L93 Difference]: Finished difference Result 6116 states and 18033 transitions. [2021-07-13 19:21:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:39,987 INFO L225 Difference]: With dead ends: 6116 [2021-07-13 19:21:39,987 INFO L226 Difference]: Without dead ends: 6112 [2021-07-13 19:21:39,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:21:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-07-13 19:21:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 5813. [2021-07-13 19:21:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 5812 states have (on average 3.0051617343427393) internal successors, (17466), 5812 states have internal predecessors, (17466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 17466 transitions. [2021-07-13 19:21:40,070 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 17466 transitions. Word has length 22 [2021-07-13 19:21:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:40,070 INFO L482 AbstractCegarLoop]: Abstraction has 5813 states and 17466 transitions. [2021-07-13 19:21:40,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 17466 transitions. [2021-07-13 19:21:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:40,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:40,075 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:40,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9887 [2021-07-13 19:21:40,276 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:40,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:40,276 INFO L82 PathProgramCache]: Analyzing trace with hash -459956339, now seen corresponding path program 178 times [2021-07-13 19:21:40,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:40,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653108111] [2021-07-13 19:21:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:40,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:40,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653108111] [2021-07-13 19:21:40,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653108111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:40,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319306263] [2021-07-13 19:21:40,344 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 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 [2021-07-13 19:21:40,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:40,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:40,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319306263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:40,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:40,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:40,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701110536] [2021-07-13 19:21:40,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:40,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:40,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:40,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:40,409 INFO L87 Difference]: Start difference. First operand 5813 states and 17466 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:40,496 INFO L93 Difference]: Finished difference Result 6374 states and 18724 transitions. [2021-07-13 19:21:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:21:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:40,505 INFO L225 Difference]: With dead ends: 6374 [2021-07-13 19:21:40,505 INFO L226 Difference]: Without dead ends: 6374 [2021-07-13 19:21:40,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:21:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-07-13 19:21:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 5821. [2021-07-13 19:21:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 3.004982817869416) internal successors, (17489), 5820 states have internal predecessors, (17489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17489 transitions. [2021-07-13 19:21:40,589 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17489 transitions. Word has length 22 [2021-07-13 19:21:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:40,589 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17489 transitions. [2021-07-13 19:21:40,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17489 transitions. [2021-07-13 19:21:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:40,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:40,595 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:40,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9888,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:40,795 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:40,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2105963623, now seen corresponding path program 179 times [2021-07-13 19:21:40,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:40,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905684684] [2021-07-13 19:21:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:40,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:40,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905684684] [2021-07-13 19:21:40,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905684684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:40,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769687584] [2021-07-13 19:21:40,849 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 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 [2021-07-13 19:21:40,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:21:40,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:40,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:40,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:40,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769687584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:40,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:40,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:21:40,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525008243] [2021-07-13 19:21:40,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:40,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:40,938 INFO L87 Difference]: Start difference. First operand 5821 states and 17489 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:41,036 INFO L93 Difference]: Finished difference Result 6454 states and 18955 transitions. [2021-07-13 19:21:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:21:41,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:41,045 INFO L225 Difference]: With dead ends: 6454 [2021-07-13 19:21:41,046 INFO L226 Difference]: Without dead ends: 6454 [2021-07-13 19:21:41,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:21:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-07-13 19:21:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 5751. [2021-07-13 19:21:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5750 states have (on average 3.001391304347826) internal successors, (17258), 5750 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 17258 transitions. [2021-07-13 19:21:41,148 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 17258 transitions. Word has length 22 [2021-07-13 19:21:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:41,148 INFO L482 AbstractCegarLoop]: Abstraction has 5751 states and 17258 transitions. [2021-07-13 19:21:41,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 17258 transitions. [2021-07-13 19:21:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:41,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:41,153 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:41,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9889,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:41,353 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash 45103821, now seen corresponding path program 180 times [2021-07-13 19:21:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:41,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031676978] [2021-07-13 19:21:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:41,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:41,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031676978] [2021-07-13 19:21:41,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031676978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:41,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708537067] [2021-07-13 19:21:41,409 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 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 [2021-07-13 19:21:41,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:21:41,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:41,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:41,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:41,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708537067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:41,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:41,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:21:41,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45377458] [2021-07-13 19:21:41,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:41,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:41,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:41,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:41,479 INFO L87 Difference]: Start difference. First operand 5751 states and 17258 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:41,576 INFO L93 Difference]: Finished difference Result 9965 states and 29813 transitions. [2021-07-13 19:21:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:21:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:41,593 INFO L225 Difference]: With dead ends: 9965 [2021-07-13 19:21:41,593 INFO L226 Difference]: Without dead ends: 9965 [2021-07-13 19:21:41,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:21:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9965 states. [2021-07-13 19:21:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9965 to 9679. [2021-07-13 19:21:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 3.0377144038024384) internal successors, (29399), 9678 states have internal predecessors, (29399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 29399 transitions. [2021-07-13 19:21:41,744 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 29399 transitions. Word has length 22 [2021-07-13 19:21:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:41,744 INFO L482 AbstractCegarLoop]: Abstraction has 9679 states and 29399 transitions. [2021-07-13 19:21:41,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 29399 transitions. [2021-07-13 19:21:41,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:41,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:41,751 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:41,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9890,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:41,952 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:41,952 INFO L82 PathProgramCache]: Analyzing trace with hash 582959399, now seen corresponding path program 181 times [2021-07-13 19:21:41,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:41,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109684252] [2021-07-13 19:21:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:42,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:42,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109684252] [2021-07-13 19:21:42,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109684252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:42,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705061156] [2021-07-13 19:21:42,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:21:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:42,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:42,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:42,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705061156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:42,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:42,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:21:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659938000] [2021-07-13 19:21:42,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:42,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:42,084 INFO L87 Difference]: Start difference. First operand 9679 states and 29399 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:42,223 INFO L93 Difference]: Finished difference Result 10632 states and 31706 transitions. [2021-07-13 19:21:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:42,239 INFO L225 Difference]: With dead ends: 10632 [2021-07-13 19:21:42,239 INFO L226 Difference]: Without dead ends: 10632 [2021-07-13 19:21:42,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:21:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-07-13 19:21:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 8622. [2021-07-13 19:21:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.030506901751537) internal successors, (26126), 8621 states have internal predecessors, (26126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 26126 transitions. [2021-07-13 19:21:42,384 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 26126 transitions. Word has length 22 [2021-07-13 19:21:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:42,384 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 26126 transitions. [2021-07-13 19:21:42,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 26126 transitions. [2021-07-13 19:21:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:42,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:42,391 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:42,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9891 [2021-07-13 19:21:42,592 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash 76613133, now seen corresponding path program 182 times [2021-07-13 19:21:42,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:42,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563382316] [2021-07-13 19:21:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:42,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:42,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563382316] [2021-07-13 19:21:42,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563382316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:42,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204149187] [2021-07-13 19:21:42,661 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 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 [2021-07-13 19:21:42,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:42,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:42,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:42,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:42,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204149187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:42,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:42,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:21:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91905588] [2021-07-13 19:21:42,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:42,736 INFO L87 Difference]: Start difference. First operand 8622 states and 26126 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:42,921 INFO L93 Difference]: Finished difference Result 14571 states and 43929 transitions. [2021-07-13 19:21:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:21:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:42,949 INFO L225 Difference]: With dead ends: 14571 [2021-07-13 19:21:42,949 INFO L226 Difference]: Without dead ends: 14571 [2021-07-13 19:21:42,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:21:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2021-07-13 19:21:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 13534. [2021-07-13 19:21:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 3.05660237936895) internal successors, (41365), 13533 states have internal predecessors, (41365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 41365 transitions. [2021-07-13 19:21:43,176 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 41365 transitions. Word has length 22 [2021-07-13 19:21:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:43,176 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 41365 transitions. [2021-07-13 19:21:43,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 41365 transitions. [2021-07-13 19:21:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:43,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:43,185 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:43,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9892 [2021-07-13 19:21:43,386 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:43,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1559748071, now seen corresponding path program 183 times [2021-07-13 19:21:43,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:43,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050953609] [2021-07-13 19:21:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:43,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050953609] [2021-07-13 19:21:43,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050953609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752691363] [2021-07-13 19:21:43,458 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 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 [2021-07-13 19:21:43,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:21:43,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:43,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752691363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:43,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:43,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:21:43,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259708273] [2021-07-13 19:21:43,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:43,552 INFO L87 Difference]: Start difference. First operand 13534 states and 41365 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:43,837 INFO L93 Difference]: Finished difference Result 19456 states and 59104 transitions. [2021-07-13 19:21:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:21:43,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:43,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:43,874 INFO L225 Difference]: With dead ends: 19456 [2021-07-13 19:21:43,874 INFO L226 Difference]: Without dead ends: 19456 [2021-07-13 19:21:43,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:21:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19456 states. [2021-07-13 19:21:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19456 to 17545. [2021-07-13 19:21:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.0747264021887823) internal successors, (53943), 17544 states have internal predecessors, (53943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 53943 transitions. [2021-07-13 19:21:44,244 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 53943 transitions. Word has length 22 [2021-07-13 19:21:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:44,244 INFO L482 AbstractCegarLoop]: Abstraction has 17545 states and 53943 transitions. [2021-07-13 19:21:44,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 53943 transitions. [2021-07-13 19:21:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:44,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:44,255 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:44,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9893 [2021-07-13 19:21:44,456 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:44,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:44,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1491148885, now seen corresponding path program 184 times [2021-07-13 19:21:44,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:44,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592619698] [2021-07-13 19:21:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:44,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:44,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592619698] [2021-07-13 19:21:44,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592619698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:44,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623948075] [2021-07-13 19:21:44,524 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 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 [2021-07-13 19:21:44,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:44,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:44,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:44,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:44,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623948075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:44,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:44,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:21:44,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667496201] [2021-07-13 19:21:44,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:44,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:44,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:44,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:44,588 INFO L87 Difference]: Start difference. First operand 17545 states and 53943 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:44,845 INFO L93 Difference]: Finished difference Result 24132 states and 73287 transitions. [2021-07-13 19:21:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:21:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:44,896 INFO L225 Difference]: With dead ends: 24132 [2021-07-13 19:21:44,896 INFO L226 Difference]: Without dead ends: 24132 [2021-07-13 19:21:44,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:21:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24132 states. [2021-07-13 19:21:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24132 to 13806. [2021-07-13 19:21:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.0678739587106123) internal successors, (42352), 13805 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 42352 transitions. [2021-07-13 19:21:45,232 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 42352 transitions. Word has length 22 [2021-07-13 19:21:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:45,232 INFO L482 AbstractCegarLoop]: Abstraction has 13806 states and 42352 transitions. [2021-07-13 19:21:45,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 42352 transitions. [2021-07-13 19:21:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:45,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:45,241 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:45,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9894,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:45,442 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 223691707, now seen corresponding path program 185 times [2021-07-13 19:21:45,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:45,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748457507] [2021-07-13 19:21:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:45,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:45,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748457507] [2021-07-13 19:21:45,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748457507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:45,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366351842] [2021-07-13 19:21:45,510 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 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 [2021-07-13 19:21:45,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:21:45,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:45,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366351842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:45,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:45,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:21:45,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632722783] [2021-07-13 19:21:45,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:45,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:45,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:45,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:45,575 INFO L87 Difference]: Start difference. First operand 13806 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:45,798 INFO L93 Difference]: Finished difference Result 20948 states and 63957 transitions. [2021-07-13 19:21:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:21:45,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:45,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:45,838 INFO L225 Difference]: With dead ends: 20948 [2021-07-13 19:21:45,838 INFO L226 Difference]: Without dead ends: 20948 [2021-07-13 19:21:45,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:21:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-07-13 19:21:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 19052. [2021-07-13 19:21:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 3.0863996640596296) internal successors, (58799), 19051 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 58799 transitions. [2021-07-13 19:21:46,205 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 58799 transitions. Word has length 22 [2021-07-13 19:21:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:46,205 INFO L482 AbstractCegarLoop]: Abstraction has 19052 states and 58799 transitions. [2021-07-13 19:21:46,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 58799 transitions. [2021-07-13 19:21:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:46,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:46,215 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:46,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9895 [2021-07-13 19:21:46,416 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:46,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1706826645, now seen corresponding path program 186 times [2021-07-13 19:21:46,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:46,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106549257] [2021-07-13 19:21:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:46,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:46,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106549257] [2021-07-13 19:21:46,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106549257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:46,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089894161] [2021-07-13 19:21:46,523 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 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 [2021-07-13 19:21:46,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:21:46,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:46,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089894161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:46,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:46,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:21:46,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462521925] [2021-07-13 19:21:46,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:46,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:46,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:46,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:46,590 INFO L87 Difference]: Start difference. First operand 19052 states and 58799 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:46,961 INFO L93 Difference]: Finished difference Result 28543 states and 87595 transitions. [2021-07-13 19:21:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:21:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:47,025 INFO L225 Difference]: With dead ends: 28543 [2021-07-13 19:21:47,025 INFO L226 Difference]: Without dead ends: 28543 [2021-07-13 19:21:47,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:21:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-07-13 19:21:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 26854. [2021-07-13 19:21:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26854 states, 26853 states have (on average 3.0954455740513165) internal successors, (83122), 26853 states have internal predecessors, (83122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26854 states to 26854 states and 83122 transitions. [2021-07-13 19:21:47,552 INFO L78 Accepts]: Start accepts. Automaton has 26854 states and 83122 transitions. Word has length 22 [2021-07-13 19:21:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:47,552 INFO L482 AbstractCegarLoop]: Abstraction has 26854 states and 83122 transitions. [2021-07-13 19:21:47,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26854 states and 83122 transitions. [2021-07-13 19:21:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:47,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:47,563 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:47,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9896 [2021-07-13 19:21:47,764 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:47,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1627873617, now seen corresponding path program 187 times [2021-07-13 19:21:47,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:47,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659645026] [2021-07-13 19:21:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:47,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:47,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659645026] [2021-07-13 19:21:47,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659645026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:47,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788445985] [2021-07-13 19:21:47,818 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 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 [2021-07-13 19:21:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:47,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:47,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:47,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788445985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:47,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:47,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:47,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736057287] [2021-07-13 19:21:47,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:47,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:47,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:47,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:47,878 INFO L87 Difference]: Start difference. First operand 26854 states and 83122 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:48,126 INFO L93 Difference]: Finished difference Result 27245 states and 83974 transitions. [2021-07-13 19:21:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:21:48,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:48,186 INFO L225 Difference]: With dead ends: 27245 [2021-07-13 19:21:48,186 INFO L226 Difference]: Without dead ends: 27241 [2021-07-13 19:21:48,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:21:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-07-13 19:21:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 25289. [2021-07-13 19:21:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 3.0879863967099017) internal successors, (78089), 25288 states have internal predecessors, (78089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 78089 transitions. [2021-07-13 19:21:48,952 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 78089 transitions. Word has length 22 [2021-07-13 19:21:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:48,953 INFO L482 AbstractCegarLoop]: Abstraction has 25289 states and 78089 transitions. [2021-07-13 19:21:48,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 78089 transitions. [2021-07-13 19:21:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:48,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:48,967 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:49,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9897,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:49,170 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:49,170 INFO L82 PathProgramCache]: Analyzing trace with hash -949344619, now seen corresponding path program 188 times [2021-07-13 19:21:49,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:49,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089843849] [2021-07-13 19:21:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:49,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:49,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089843849] [2021-07-13 19:21:49,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089843849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:49,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500620777] [2021-07-13 19:21:49,223 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 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 [2021-07-13 19:21:49,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:49,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:49,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:49,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500620777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:49,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:49,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:21:49,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271128351] [2021-07-13 19:21:49,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:21:49,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:21:49,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:21:49,415 INFO L87 Difference]: Start difference. First operand 25289 states and 78089 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:49,641 INFO L93 Difference]: Finished difference Result 27144 states and 83198 transitions. [2021-07-13 19:21:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:49,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:49,697 INFO L225 Difference]: With dead ends: 27144 [2021-07-13 19:21:49,697 INFO L226 Difference]: Without dead ends: 27144 [2021-07-13 19:21:49,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:21:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-07-13 19:21:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 25336. [2021-07-13 19:21:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.08656009473061) internal successors, (78198), 25335 states have internal predecessors, (78198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 78198 transitions. [2021-07-13 19:21:50,336 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 78198 transitions. Word has length 22 [2021-07-13 19:21:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:50,336 INFO L482 AbstractCegarLoop]: Abstraction has 25336 states and 78198 transitions. [2021-07-13 19:21:50,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 78198 transitions. [2021-07-13 19:21:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:50,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:50,351 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:50,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9898 [2021-07-13 19:21:50,565 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1616575343, now seen corresponding path program 189 times [2021-07-13 19:21:50,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:50,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253943338] [2021-07-13 19:21:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:50,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:50,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253943338] [2021-07-13 19:21:50,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253943338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:50,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484354403] [2021-07-13 19:21:50,639 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 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 [2021-07-13 19:21:50,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:21:50,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:50,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484354403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:50,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:50,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:50,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940712970] [2021-07-13 19:21:50,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:50,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:50,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:50,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:50,710 INFO L87 Difference]: Start difference. First operand 25336 states and 78198 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:50,965 INFO L93 Difference]: Finished difference Result 28314 states and 86669 transitions. [2021-07-13 19:21:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:21:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:51,085 INFO L225 Difference]: With dead ends: 28314 [2021-07-13 19:21:51,085 INFO L226 Difference]: Without dead ends: 28314 [2021-07-13 19:21:51,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28314 states. [2021-07-13 19:21:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28314 to 22217. [2021-07-13 19:21:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 3.076026287360461) internal successors, (68337), 22216 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 68337 transitions. [2021-07-13 19:21:51,633 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 68337 transitions. Word has length 22 [2021-07-13 19:21:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:51,633 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 68337 transitions. [2021-07-13 19:21:51,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 68337 transitions. [2021-07-13 19:21:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:51,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:51,643 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:51,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9899,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:51,844 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -444284459, now seen corresponding path program 190 times [2021-07-13 19:21:51,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:51,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438856466] [2021-07-13 19:21:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:51,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:51,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438856466] [2021-07-13 19:21:51,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438856466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:51,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990180008] [2021-07-13 19:21:51,905 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 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 [2021-07-13 19:21:51,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:51,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990180008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:51,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:51,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809826614] [2021-07-13 19:21:51,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:51,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:51,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:51,973 INFO L87 Difference]: Start difference. First operand 22217 states and 68337 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:52,311 INFO L93 Difference]: Finished difference Result 40934 states and 126275 transitions. [2021-07-13 19:21:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:21:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:52,406 INFO L225 Difference]: With dead ends: 40934 [2021-07-13 19:21:52,406 INFO L226 Difference]: Without dead ends: 40934 [2021-07-13 19:21:52,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2021-07-13 19:21:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 32281. [2021-07-13 19:21:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32281 states, 32280 states have (on average 3.1012391573729863) internal successors, (100108), 32280 states have internal predecessors, (100108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32281 states to 32281 states and 100108 transitions. [2021-07-13 19:21:53,342 INFO L78 Accepts]: Start accepts. Automaton has 32281 states and 100108 transitions. Word has length 22 [2021-07-13 19:21:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:53,342 INFO L482 AbstractCegarLoop]: Abstraction has 32281 states and 100108 transitions. [2021-07-13 19:21:53,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 32281 states and 100108 transitions. [2021-07-13 19:21:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:53,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:53,353 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:53,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9900,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:53,554 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:53,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:53,554 INFO L82 PathProgramCache]: Analyzing trace with hash 93571119, now seen corresponding path program 191 times [2021-07-13 19:21:53,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:53,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027784729] [2021-07-13 19:21:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:53,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:53,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027784729] [2021-07-13 19:21:53,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027784729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:53,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985335110] [2021-07-13 19:21:53,615 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 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 [2021-07-13 19:21:53,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:21:53,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:53,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985335110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:53,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:53,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:21:53,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383373228] [2021-07-13 19:21:53,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:21:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:21:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:21:53,687 INFO L87 Difference]: Start difference. First operand 32281 states and 100108 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:54,071 INFO L93 Difference]: Finished difference Result 45762 states and 141598 transitions. [2021-07-13 19:21:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:21:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:54,182 INFO L225 Difference]: With dead ends: 45762 [2021-07-13 19:21:54,182 INFO L226 Difference]: Without dead ends: 45762 [2021-07-13 19:21:54,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:21:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45762 states. [2021-07-13 19:21:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45762 to 45505. [2021-07-13 19:21:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45505 states, 45504 states have (on average 3.1023426511954995) internal successors, (141169), 45504 states have internal predecessors, (141169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45505 states to 45505 states and 141169 transitions. [2021-07-13 19:21:55,372 INFO L78 Accepts]: Start accepts. Automaton has 45505 states and 141169 transitions. Word has length 22 [2021-07-13 19:21:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:55,372 INFO L482 AbstractCegarLoop]: Abstraction has 45505 states and 141169 transitions. [2021-07-13 19:21:55,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 45505 states and 141169 transitions. [2021-07-13 19:21:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:55,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:55,389 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:55,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9901,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:55,589 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash -412775147, now seen corresponding path program 192 times [2021-07-13 19:21:55,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:55,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816317466] [2021-07-13 19:21:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:55,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:55,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816317466] [2021-07-13 19:21:55,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816317466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:55,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187469138] [2021-07-13 19:21:55,658 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 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 [2021-07-13 19:21:55,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:21:55,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:55,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187469138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:55,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:55,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:21:55,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346184196] [2021-07-13 19:21:55,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:55,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:55,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:55,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:55,930 INFO L87 Difference]: Start difference. First operand 45505 states and 141169 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:56,225 INFO L93 Difference]: Finished difference Result 46432 states and 143526 transitions. [2021-07-13 19:21:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:56,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:56,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:56,338 INFO L225 Difference]: With dead ends: 46432 [2021-07-13 19:21:56,338 INFO L226 Difference]: Without dead ends: 46432 [2021-07-13 19:21:56,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:21:56,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46432 states. [2021-07-13 19:21:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46432 to 45128. [2021-07-13 19:21:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45128 states, 45127 states have (on average 3.1029317260176836) internal successors, (140026), 45127 states have internal predecessors, (140026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45128 states to 45128 states and 140026 transitions. [2021-07-13 19:21:57,537 INFO L78 Accepts]: Start accepts. Automaton has 45128 states and 140026 transitions. Word has length 22 [2021-07-13 19:21:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:57,537 INFO L482 AbstractCegarLoop]: Abstraction has 45128 states and 140026 transitions. [2021-07-13 19:21:57,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 45128 states and 140026 transitions. [2021-07-13 19:21:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:21:57,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:57,554 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:57,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9902,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:57,754 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1070359791, now seen corresponding path program 193 times [2021-07-13 19:21:57,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:57,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743227559] [2021-07-13 19:21:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:57,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:57,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743227559] [2021-07-13 19:21:57,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743227559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:57,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250516837] [2021-07-13 19:21:57,831 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 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 [2021-07-13 19:21:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:57,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:21:57,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:57,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250516837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:57,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:57,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:21:57,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925396101] [2021-07-13 19:21:57,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:57,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:57,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:57,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:57,898 INFO L87 Difference]: Start difference. First operand 45128 states and 140026 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:58,457 INFO L93 Difference]: Finished difference Result 49791 states and 153978 transitions. [2021-07-13 19:21:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:21:58,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:21:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:58,594 INFO L225 Difference]: With dead ends: 49791 [2021-07-13 19:21:58,594 INFO L226 Difference]: Without dead ends: 49791 [2021-07-13 19:21:58,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:21:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49791 states. [2021-07-13 19:21:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49791 to 49280. [2021-07-13 19:21:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49280 states, 49279 states have (on average 3.102295095273849) internal successors, (152878), 49279 states have internal predecessors, (152878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49280 states to 49280 states and 152878 transitions. [2021-07-13 19:22:00,075 INFO L78 Accepts]: Start accepts. Automaton has 49280 states and 152878 transitions. Word has length 22 [2021-07-13 19:22:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:00,075 INFO L482 AbstractCegarLoop]: Abstraction has 49280 states and 152878 transitions. [2021-07-13 19:22:00,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 49280 states and 152878 transitions. [2021-07-13 19:22:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:00,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:00,094 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:00,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9903 [2021-07-13 19:22:00,294 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash -197097387, now seen corresponding path program 194 times [2021-07-13 19:22:00,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:00,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842502949] [2021-07-13 19:22:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:00,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:00,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842502949] [2021-07-13 19:22:00,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842502949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:00,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413919824] [2021-07-13 19:22:00,391 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 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 [2021-07-13 19:22:00,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:00,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:00,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:00,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:00,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413919824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:00,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:00,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:22:00,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416174640] [2021-07-13 19:22:00,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:00,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:00,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:00,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:00,460 INFO L87 Difference]: Start difference. First operand 49280 states and 152878 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:01,192 INFO L93 Difference]: Finished difference Result 52302 states and 161626 transitions. [2021-07-13 19:22:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:22:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:01,346 INFO L225 Difference]: With dead ends: 52302 [2021-07-13 19:22:01,346 INFO L226 Difference]: Without dead ends: 52302 [2021-07-13 19:22:01,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:22:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52302 states. [2021-07-13 19:22:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52302 to 51634. [2021-07-13 19:22:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51634 states, 51633 states have (on average 3.101311176960471) internal successors, (160130), 51633 states have internal predecessors, (160130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51634 states to 51634 states and 160130 transitions. [2021-07-13 19:22:02,942 INFO L78 Accepts]: Start accepts. Automaton has 51634 states and 160130 transitions. Word has length 22 [2021-07-13 19:22:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:02,942 INFO L482 AbstractCegarLoop]: Abstraction has 51634 states and 160130 transitions. [2021-07-13 19:22:02,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 51634 states and 160130 transitions. [2021-07-13 19:22:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:02,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:02,962 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:03,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9904,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:03,163 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:03,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1546669833, now seen corresponding path program 195 times [2021-07-13 19:22:03,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:03,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040895421] [2021-07-13 19:22:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:03,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:03,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040895421] [2021-07-13 19:22:03,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040895421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:03,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063595627] [2021-07-13 19:22:03,230 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 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 [2021-07-13 19:22:03,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:22:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:03,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063595627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:03,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:03,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:22:03,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301073800] [2021-07-13 19:22:03,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:03,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:03,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:03,296 INFO L87 Difference]: Start difference. First operand 51634 states and 160130 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:03,775 INFO L93 Difference]: Finished difference Result 52382 states and 162119 transitions. [2021-07-13 19:22:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:22:03,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:04,139 INFO L225 Difference]: With dead ends: 52382 [2021-07-13 19:22:04,139 INFO L226 Difference]: Without dead ends: 52376 [2021-07-13 19:22:04,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52376 states. [2021-07-13 19:22:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52376 to 52177. [2021-07-13 19:22:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52177 states, 52176 states have (on average 3.102135081263416) internal successors, (161857), 52176 states have internal predecessors, (161857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52177 states to 52177 states and 161857 transitions. [2021-07-13 19:22:05,376 INFO L78 Accepts]: Start accepts. Automaton has 52177 states and 161857 transitions. Word has length 22 [2021-07-13 19:22:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:05,376 INFO L482 AbstractCegarLoop]: Abstraction has 52177 states and 161857 transitions. [2021-07-13 19:22:05,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 52177 states and 161857 transitions. [2021-07-13 19:22:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:05,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:05,396 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:05,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9905 [2021-07-13 19:22:05,597 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash 471577549, now seen corresponding path program 196 times [2021-07-13 19:22:05,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:05,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691505993] [2021-07-13 19:22:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:05,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:05,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691505993] [2021-07-13 19:22:05,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691505993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:05,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961907112] [2021-07-13 19:22:05,664 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 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 [2021-07-13 19:22:05,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:05,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:05,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:05,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:05,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961907112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:05,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:05,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:22:05,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775008896] [2021-07-13 19:22:05,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:05,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:05,752 INFO L87 Difference]: Start difference. First operand 52177 states and 161857 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:06,487 INFO L93 Difference]: Finished difference Result 71897 states and 222309 transitions. [2021-07-13 19:22:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:22:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:06,720 INFO L225 Difference]: With dead ends: 71897 [2021-07-13 19:22:06,720 INFO L226 Difference]: Without dead ends: 71897 [2021-07-13 19:22:06,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71897 states. [2021-07-13 19:22:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71897 to 70150. [2021-07-13 19:22:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70150 states, 70149 states have (on average 3.098347802534605) internal successors, (217346), 70149 states have internal predecessors, (217346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70150 states to 70150 states and 217346 transitions. [2021-07-13 19:22:08,711 INFO L78 Accepts]: Start accepts. Automaton has 70150 states and 217346 transitions. Word has length 22 [2021-07-13 19:22:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:08,711 INFO L482 AbstractCegarLoop]: Abstraction has 70150 states and 217346 transitions. [2021-07-13 19:22:08,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 70150 states and 217346 transitions. [2021-07-13 19:22:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:08,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:08,734 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:08,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9906,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:08,935 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1009433127, now seen corresponding path program 197 times [2021-07-13 19:22:08,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:08,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864160976] [2021-07-13 19:22:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:08,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:08,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864160976] [2021-07-13 19:22:08,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864160976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:08,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936434443] [2021-07-13 19:22:08,999 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 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 [2021-07-13 19:22:09,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:22:09,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:09,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:09,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936434443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:09,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:09,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:22:09,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934099420] [2021-07-13 19:22:09,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:09,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:09,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:09,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:09,065 INFO L87 Difference]: Start difference. First operand 70150 states and 217346 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:09,842 INFO L93 Difference]: Finished difference Result 81568 states and 251022 transitions. [2021-07-13 19:22:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:10,068 INFO L225 Difference]: With dead ends: 81568 [2021-07-13 19:22:10,068 INFO L226 Difference]: Without dead ends: 81568 [2021-07-13 19:22:10,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:10,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2021-07-13 19:22:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 71366. [2021-07-13 19:22:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71365 states have (on average 3.0934491697610875) internal successors, (220764), 71365 states have internal predecessors, (220764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 220764 transitions. [2021-07-13 19:22:12,078 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 220764 transitions. Word has length 22 [2021-07-13 19:22:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:12,078 INFO L482 AbstractCegarLoop]: Abstraction has 71366 states and 220764 transitions. [2021-07-13 19:22:12,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 220764 transitions. [2021-07-13 19:22:12,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:12,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:12,370 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:12,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9907,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:12,592 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:12,592 INFO L82 PathProgramCache]: Analyzing trace with hash 503086861, now seen corresponding path program 198 times [2021-07-13 19:22:12,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:12,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832258639] [2021-07-13 19:22:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:12,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:12,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832258639] [2021-07-13 19:22:12,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832258639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:12,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632986559] [2021-07-13 19:22:12,659 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 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 [2021-07-13 19:22:12,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:22:12,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:12,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:12,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632986559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:12,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:12,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:22:12,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115675161] [2021-07-13 19:22:12,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:12,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:12,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:12,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:12,744 INFO L87 Difference]: Start difference. First operand 71366 states and 220764 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:13,688 INFO L93 Difference]: Finished difference Result 104720 states and 323372 transitions. [2021-07-13 19:22:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:22:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:14,056 INFO L225 Difference]: With dead ends: 104720 [2021-07-13 19:22:14,057 INFO L226 Difference]: Without dead ends: 104720 [2021-07-13 19:22:14,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:22:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104720 states. [2021-07-13 19:22:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104720 to 99727. [2021-07-13 19:22:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99727 states, 99726 states have (on average 3.0966046968694223) internal successors, (308812), 99726 states have internal predecessors, (308812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99727 states to 99727 states and 308812 transitions. [2021-07-13 19:22:17,054 INFO L78 Accepts]: Start accepts. Automaton has 99727 states and 308812 transitions. Word has length 22 [2021-07-13 19:22:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:17,055 INFO L482 AbstractCegarLoop]: Abstraction has 99727 states and 308812 transitions. [2021-07-13 19:22:17,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 99727 states and 308812 transitions. [2021-07-13 19:22:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:17,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:17,079 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:17,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9908 [2021-07-13 19:22:17,279 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1986221799, now seen corresponding path program 199 times [2021-07-13 19:22:17,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:17,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705260776] [2021-07-13 19:22:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:17,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:17,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705260776] [2021-07-13 19:22:17,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705260776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:17,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964966968] [2021-07-13 19:22:17,352 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 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 [2021-07-13 19:22:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:17,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:17,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:17,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964966968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:17,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:17,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:22:17,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862458470] [2021-07-13 19:22:17,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:17,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:17,439 INFO L87 Difference]: Start difference. First operand 99727 states and 308812 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:18,680 INFO L93 Difference]: Finished difference Result 122524 states and 378377 transitions. [2021-07-13 19:22:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:22:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:19,458 INFO L225 Difference]: With dead ends: 122524 [2021-07-13 19:22:19,459 INFO L226 Difference]: Without dead ends: 122524 [2021-07-13 19:22:19,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:22:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122524 states. [2021-07-13 19:22:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122524 to 119170. [2021-07-13 19:22:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119170 states, 119169 states have (on average 3.0954358935629234) internal successors, (368880), 119169 states have internal predecessors, (368880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119170 states to 119170 states and 368880 transitions. [2021-07-13 19:22:23,103 INFO L78 Accepts]: Start accepts. Automaton has 119170 states and 368880 transitions. Word has length 22 [2021-07-13 19:22:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:23,104 INFO L482 AbstractCegarLoop]: Abstraction has 119170 states and 368880 transitions. [2021-07-13 19:22:23,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 119170 states and 368880 transitions. [2021-07-13 19:22:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:23,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:23,140 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:23,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9909,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:23,348 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:23,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516429, now seen corresponding path program 200 times [2021-07-13 19:22:23,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:23,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321137328] [2021-07-13 19:22:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:23,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321137328] [2021-07-13 19:22:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321137328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:23,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841606012] [2021-07-13 19:22:23,418 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 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 [2021-07-13 19:22:23,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:23,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:23,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:23,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:23,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841606012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:23,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:23,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:22:23,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591965471] [2021-07-13 19:22:23,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:23,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:23,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:23,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:23,484 INFO L87 Difference]: Start difference. First operand 119170 states and 368880 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:24,611 INFO L93 Difference]: Finished difference Result 149360 states and 458856 transitions. [2021-07-13 19:22:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:22:24,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:25,134 INFO L225 Difference]: With dead ends: 149360 [2021-07-13 19:22:25,134 INFO L226 Difference]: Without dead ends: 149360 [2021-07-13 19:22:25,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149360 states. [2021-07-13 19:22:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149360 to 66855. [2021-07-13 19:22:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66855 states, 66854 states have (on average 3.0857241152361863) internal successors, (206293), 66854 states have internal predecessors, (206293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66855 states to 66855 states and 206293 transitions. [2021-07-13 19:22:28,097 INFO L78 Accepts]: Start accepts. Automaton has 66855 states and 206293 transitions. Word has length 22 [2021-07-13 19:22:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:28,097 INFO L482 AbstractCegarLoop]: Abstraction has 66855 states and 206293 transitions. [2021-07-13 19:22:28,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 66855 states and 206293 transitions. [2021-07-13 19:22:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:28,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:28,117 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:28,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9910,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:28,318 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash -564381491, now seen corresponding path program 201 times [2021-07-13 19:22:28,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:28,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058137805] [2021-07-13 19:22:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:28,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:28,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058137805] [2021-07-13 19:22:28,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058137805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:28,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449213072] [2021-07-13 19:22:28,391 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 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 [2021-07-13 19:22:28,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:22:28,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:28,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:28,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449213072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:28,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:28,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:22:28,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767204736] [2021-07-13 19:22:28,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:28,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:28,458 INFO L87 Difference]: Start difference. First operand 66855 states and 206293 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:29,353 INFO L93 Difference]: Finished difference Result 89497 states and 274720 transitions. [2021-07-13 19:22:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:22:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:29,629 INFO L225 Difference]: With dead ends: 89497 [2021-07-13 19:22:29,629 INFO L226 Difference]: Without dead ends: 89497 [2021-07-13 19:22:29,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 503.4ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:22:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89497 states. [2021-07-13 19:22:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89497 to 43123. [2021-07-13 19:22:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43123 states, 43122 states have (on average 3.0917397152265664) internal successors, (133322), 43122 states have internal predecessors, (133322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43123 states to 43123 states and 133322 transitions. [2021-07-13 19:22:31,412 INFO L78 Accepts]: Start accepts. Automaton has 43123 states and 133322 transitions. Word has length 22 [2021-07-13 19:22:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:31,412 INFO L482 AbstractCegarLoop]: Abstraction has 43123 states and 133322 transitions. [2021-07-13 19:22:31,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 43123 states and 133322 transitions. [2021-07-13 19:22:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:31,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:31,425 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:31,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9911,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:31,626 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:31,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1579474701, now seen corresponding path program 202 times [2021-07-13 19:22:31,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:31,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527345325] [2021-07-13 19:22:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:31,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:31,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527345325] [2021-07-13 19:22:31,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527345325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:31,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030522379] [2021-07-13 19:22:31,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:22:31,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:31,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:31,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030522379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:31,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:31,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:22:31,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339792370] [2021-07-13 19:22:31,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:31,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:31,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:31,749 INFO L87 Difference]: Start difference. First operand 43123 states and 133322 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:32,000 INFO L93 Difference]: Finished difference Result 46015 states and 141473 transitions. [2021-07-13 19:22:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:32,098 INFO L225 Difference]: With dead ends: 46015 [2021-07-13 19:22:32,098 INFO L226 Difference]: Without dead ends: 46015 [2021-07-13 19:22:32,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46015 states. [2021-07-13 19:22:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46015 to 33259. [2021-07-13 19:22:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33259 states, 33258 states have (on average 3.08671597811053) internal successors, (102658), 33258 states have internal predecessors, (102658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33259 states to 33259 states and 102658 transitions. [2021-07-13 19:22:33,142 INFO L78 Accepts]: Start accepts. Automaton has 33259 states and 102658 transitions. Word has length 22 [2021-07-13 19:22:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:33,142 INFO L482 AbstractCegarLoop]: Abstraction has 33259 states and 102658 transitions. [2021-07-13 19:22:33,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 33259 states and 102658 transitions. [2021-07-13 19:22:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:33,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:33,153 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:33,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9912,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:33,353 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:33,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2117330279, now seen corresponding path program 203 times [2021-07-13 19:22:33,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:33,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282882797] [2021-07-13 19:22:33,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:33,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:33,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282882797] [2021-07-13 19:22:33,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282882797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:33,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69440907] [2021-07-13 19:22:33,431 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 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 [2021-07-13 19:22:33,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:22:33,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:33,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69440907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:33,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:33,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:22:33,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690993758] [2021-07-13 19:22:33,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:33,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:33,497 INFO L87 Difference]: Start difference. First operand 33259 states and 102658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:33,698 INFO L93 Difference]: Finished difference Result 35745 states and 109875 transitions. [2021-07-13 19:22:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:22:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:33,960 INFO L225 Difference]: With dead ends: 35745 [2021-07-13 19:22:33,961 INFO L226 Difference]: Without dead ends: 35745 [2021-07-13 19:22:33,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:22:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35745 states. [2021-07-13 19:22:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35745 to 35523. [2021-07-13 19:22:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35523 states, 35522 states have (on average 3.083694611789877) internal successors, (109539), 35522 states have internal predecessors, (109539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35523 states to 35523 states and 109539 transitions. [2021-07-13 19:22:34,741 INFO L78 Accepts]: Start accepts. Automaton has 35523 states and 109539 transitions. Word has length 22 [2021-07-13 19:22:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:34,741 INFO L482 AbstractCegarLoop]: Abstraction has 35523 states and 109539 transitions. [2021-07-13 19:22:34,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 35523 states and 109539 transitions. [2021-07-13 19:22:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:34,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:34,753 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:34,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9913,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:34,954 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:34,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1610984013, now seen corresponding path program 204 times [2021-07-13 19:22:34,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:34,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065857266] [2021-07-13 19:22:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:35,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:35,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065857266] [2021-07-13 19:22:35,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065857266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:35,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428952351] [2021-07-13 19:22:35,024 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 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 [2021-07-13 19:22:35,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:22:35,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:35,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:35,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428952351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:35,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:35,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:22:35,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610135126] [2021-07-13 19:22:35,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:35,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:35,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:35,090 INFO L87 Difference]: Start difference. First operand 35523 states and 109539 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:35,347 INFO L93 Difference]: Finished difference Result 36167 states and 111049 transitions. [2021-07-13 19:22:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:22:35,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:35,427 INFO L225 Difference]: With dead ends: 36167 [2021-07-13 19:22:35,427 INFO L226 Difference]: Without dead ends: 36167 [2021-07-13 19:22:35,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:22:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-07-13 19:22:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 33964. [2021-07-13 19:22:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33964 states, 33963 states have (on average 3.083973736124606) internal successors, (104741), 33963 states have internal predecessors, (104741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33964 states to 33964 states and 104741 transitions. [2021-07-13 19:22:36,465 INFO L78 Accepts]: Start accepts. Automaton has 33964 states and 104741 transitions. Word has length 22 [2021-07-13 19:22:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:36,465 INFO L482 AbstractCegarLoop]: Abstraction has 33964 states and 104741 transitions. [2021-07-13 19:22:36,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 33964 states and 104741 transitions. [2021-07-13 19:22:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:36,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:36,478 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:36,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9914,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:36,701 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1200848345, now seen corresponding path program 205 times [2021-07-13 19:22:36,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:36,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959637671] [2021-07-13 19:22:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:36,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:36,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959637671] [2021-07-13 19:22:36,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959637671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:36,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279609794] [2021-07-13 19:22:36,775 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 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 [2021-07-13 19:22:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:36,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:36,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279609794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:36,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:36,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:22:36,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619779549] [2021-07-13 19:22:36,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:36,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:36,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:36,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:36,838 INFO L87 Difference]: Start difference. First operand 33964 states and 104741 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:37,159 INFO L93 Difference]: Finished difference Result 36419 states and 111773 transitions. [2021-07-13 19:22:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:37,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:37,241 INFO L225 Difference]: With dead ends: 36419 [2021-07-13 19:22:37,241 INFO L226 Difference]: Without dead ends: 36419 [2021-07-13 19:22:37,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:22:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36419 states. [2021-07-13 19:22:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36419 to 34818. [2021-07-13 19:22:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34818 states, 34817 states have (on average 3.083206479593302) internal successors, (107348), 34817 states have internal predecessors, (107348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34818 states to 34818 states and 107348 transitions. [2021-07-13 19:22:38,188 INFO L78 Accepts]: Start accepts. Automaton has 34818 states and 107348 transitions. Word has length 22 [2021-07-13 19:22:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:38,188 INFO L482 AbstractCegarLoop]: Abstraction has 34818 states and 107348 transitions. [2021-07-13 19:22:38,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 34818 states and 107348 transitions. [2021-07-13 19:22:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:38,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:38,199 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:38,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9915 [2021-07-13 19:22:38,400 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1826661773, now seen corresponding path program 206 times [2021-07-13 19:22:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:38,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134292500] [2021-07-13 19:22:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:38,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134292500] [2021-07-13 19:22:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134292500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589007128] [2021-07-13 19:22:38,476 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 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 [2021-07-13 19:22:38,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:38,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:38,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:38,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589007128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:38,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:38,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:22:38,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363795359] [2021-07-13 19:22:38,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:38,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:38,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:38,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:38,540 INFO L87 Difference]: Start difference. First operand 34818 states and 107348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:38,969 INFO L93 Difference]: Finished difference Result 36428 states and 111724 transitions. [2021-07-13 19:22:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:22:38,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:39,054 INFO L225 Difference]: With dead ends: 36428 [2021-07-13 19:22:39,054 INFO L226 Difference]: Without dead ends: 36428 [2021-07-13 19:22:39,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:22:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36428 states. [2021-07-13 19:22:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36428 to 34194. [2021-07-13 19:22:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853683502471267) internal successors, (105498), 34193 states have internal predecessors, (105498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105498 transitions. [2021-07-13 19:22:39,936 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105498 transitions. Word has length 22 [2021-07-13 19:22:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:39,936 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105498 transitions. [2021-07-13 19:22:39,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105498 transitions. [2021-07-13 19:22:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:39,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:39,947 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:40,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9916,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:40,148 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1663098905, now seen corresponding path program 207 times [2021-07-13 19:22:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:40,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259930354] [2021-07-13 19:22:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:40,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:40,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259930354] [2021-07-13 19:22:40,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259930354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:40,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335842114] [2021-07-13 19:22:40,199 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 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 [2021-07-13 19:22:40,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:22:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:40,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335842114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:40,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:40,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:22:40,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529936855] [2021-07-13 19:22:40,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:40,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:40,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:40,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:40,260 INFO L87 Difference]: Start difference. First operand 34194 states and 105498 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:40,543 INFO L93 Difference]: Finished difference Result 34348 states and 105669 transitions. [2021-07-13 19:22:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:22:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:40,620 INFO L225 Difference]: With dead ends: 34348 [2021-07-13 19:22:40,620 INFO L226 Difference]: Without dead ends: 34344 [2021-07-13 19:22:40,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:22:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2021-07-13 19:22:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34194. [2021-07-13 19:22:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853098587430177) internal successors, (105496), 34193 states have internal predecessors, (105496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105496 transitions. [2021-07-13 19:22:41,559 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105496 transitions. Word has length 22 [2021-07-13 19:22:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:41,559 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105496 transitions. [2021-07-13 19:22:41,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105496 transitions. [2021-07-13 19:22:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:41,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:41,570 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:41,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9917 [2021-07-13 19:22:41,771 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:41,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1971295143, now seen corresponding path program 208 times [2021-07-13 19:22:41,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:41,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183470919] [2021-07-13 19:22:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:41,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:41,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183470919] [2021-07-13 19:22:41,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183470919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:41,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59054808] [2021-07-13 19:22:41,846 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 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 [2021-07-13 19:22:41,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:41,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:41,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59054808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:41,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:41,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:22:41,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201644010] [2021-07-13 19:22:41,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:22:41,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:41,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:22:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:41,916 INFO L87 Difference]: Start difference. First operand 34194 states and 105496 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:42,278 INFO L93 Difference]: Finished difference Result 37342 states and 114450 transitions. [2021-07-13 19:22:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:22:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:42,353 INFO L225 Difference]: With dead ends: 37342 [2021-07-13 19:22:42,353 INFO L226 Difference]: Without dead ends: 37342 [2021-07-13 19:22:42,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:22:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2021-07-13 19:22:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 32084. [2021-07-13 19:22:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32084 states, 32083 states have (on average 3.0869307733067357) internal successors, (99038), 32083 states have internal predecessors, (99038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32084 states to 32084 states and 99038 transitions. [2021-07-13 19:22:43,298 INFO L78 Accepts]: Start accepts. Automaton has 32084 states and 99038 transitions. Word has length 22 [2021-07-13 19:22:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:43,298 INFO L482 AbstractCegarLoop]: Abstraction has 32084 states and 99038 transitions. [2021-07-13 19:22:43,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 32084 states and 99038 transitions. [2021-07-13 19:22:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:43,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:43,309 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:43,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9918 [2021-07-13 19:22:43,509 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1334828289, now seen corresponding path program 209 times [2021-07-13 19:22:43,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:43,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395064654] [2021-07-13 19:22:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:43,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:43,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395064654] [2021-07-13 19:22:43,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395064654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:43,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689704732] [2021-07-13 19:22:43,582 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 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 [2021-07-13 19:22:43,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:22:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:43,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:43,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689704732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:43,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:43,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:22:43,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870945562] [2021-07-13 19:22:43,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:22:43,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:22:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:43,653 INFO L87 Difference]: Start difference. First operand 32084 states and 99038 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:43,953 INFO L93 Difference]: Finished difference Result 32697 states and 100396 transitions. [2021-07-13 19:22:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:22:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:44,026 INFO L225 Difference]: With dead ends: 32697 [2021-07-13 19:22:44,026 INFO L226 Difference]: Without dead ends: 32697 [2021-07-13 19:22:44,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:22:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32697 states. [2021-07-13 19:22:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32697 to 31320. [2021-07-13 19:22:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31320 states, 31319 states have (on average 3.0872313930840702) internal successors, (96689), 31319 states have internal predecessors, (96689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31320 states to 31320 states and 96689 transitions. [2021-07-13 19:22:44,938 INFO L78 Accepts]: Start accepts. Automaton has 31320 states and 96689 transitions. Word has length 22 [2021-07-13 19:22:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:44,938 INFO L482 AbstractCegarLoop]: Abstraction has 31320 states and 96689 transitions. [2021-07-13 19:22:44,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 31320 states and 96689 transitions. [2021-07-13 19:22:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:44,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:44,947 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:45,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9919,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:45,148 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash 67371111, now seen corresponding path program 210 times [2021-07-13 19:22:45,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:45,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919778322] [2021-07-13 19:22:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:45,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:45,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919778322] [2021-07-13 19:22:45,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919778322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:45,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912895834] [2021-07-13 19:22:45,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:22:45,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:22:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:45,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912895834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:45,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:22:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822869209] [2021-07-13 19:22:45,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:22:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:22:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:45,297 INFO L87 Difference]: Start difference. First operand 31320 states and 96689 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:45,700 INFO L93 Difference]: Finished difference Result 33049 states and 101433 transitions. [2021-07-13 19:22:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:22:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:45,776 INFO L225 Difference]: With dead ends: 33049 [2021-07-13 19:22:45,776 INFO L226 Difference]: Without dead ends: 33049 [2021-07-13 19:22:45,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:22:45,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33049 states. [2021-07-13 19:22:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33049 to 30873. [2021-07-13 19:22:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30873 states, 30872 states have (on average 3.089045089401399) internal successors, (95365), 30872 states have internal predecessors, (95365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30873 states to 30873 states and 95365 transitions. [2021-07-13 19:22:46,635 INFO L78 Accepts]: Start accepts. Automaton has 30873 states and 95365 transitions. Word has length 22 [2021-07-13 19:22:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:46,635 INFO L482 AbstractCegarLoop]: Abstraction has 30873 states and 95365 transitions. [2021-07-13 19:22:46,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 30873 states and 95365 transitions. [2021-07-13 19:22:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:46,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:46,644 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:46,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9920 [2021-07-13 19:22:46,845 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -658261175, now seen corresponding path program 211 times [2021-07-13 19:22:46,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:46,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218707197] [2021-07-13 19:22:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:46,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:46,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218707197] [2021-07-13 19:22:46,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218707197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:46,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584868267] [2021-07-13 19:22:46,900 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:46,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:46,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:46,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584868267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:46,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:46,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:22:46,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819288840] [2021-07-13 19:22:46,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:46,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:46,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:46,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:46,959 INFO L87 Difference]: Start difference. First operand 30873 states and 95365 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:47,238 INFO L93 Difference]: Finished difference Result 31092 states and 95691 transitions. [2021-07-13 19:22:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:22:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:47,317 INFO L225 Difference]: With dead ends: 31092 [2021-07-13 19:22:47,317 INFO L226 Difference]: Without dead ends: 31088 [2021-07-13 19:22:47,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:22:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31088 states. [2021-07-13 19:22:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31088 to 30908. [2021-07-13 19:22:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30908 states, 30907 states have (on average 3.088588345682208) internal successors, (95459), 30907 states have internal predecessors, (95459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30908 states to 30908 states and 95459 transitions. [2021-07-13 19:22:48,030 INFO L78 Accepts]: Start accepts. Automaton has 30908 states and 95459 transitions. Word has length 22 [2021-07-13 19:22:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:48,030 INFO L482 AbstractCegarLoop]: Abstraction has 30908 states and 95459 transitions. [2021-07-13 19:22:48,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30908 states and 95459 transitions. [2021-07-13 19:22:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:48,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:48,040 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:48,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9921,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:48,241 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1059487885, now seen corresponding path program 212 times [2021-07-13 19:22:48,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:48,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940661737] [2021-07-13 19:22:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:48,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:48,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940661737] [2021-07-13 19:22:48,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940661737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:48,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668511351] [2021-07-13 19:22:48,297 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:48,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:48,479 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 19:22:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668511351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:48,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:48,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:22:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689483874] [2021-07-13 19:22:48,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:48,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:48,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:48,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:48,497 INFO L87 Difference]: Start difference. First operand 30908 states and 95459 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:48,702 INFO L93 Difference]: Finished difference Result 31582 states and 97082 transitions. [2021-07-13 19:22:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:22:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:48,772 INFO L225 Difference]: With dead ends: 31582 [2021-07-13 19:22:48,772 INFO L226 Difference]: Without dead ends: 31582 [2021-07-13 19:22:48,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:22:48,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2021-07-13 19:22:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 30923. [2021-07-13 19:22:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30923 states, 30922 states have (on average 3.0885130327921866) internal successors, (95503), 30922 states have internal predecessors, (95503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30923 states to 30923 states and 95503 transitions. [2021-07-13 19:22:49,441 INFO L78 Accepts]: Start accepts. Automaton has 30923 states and 95503 transitions. Word has length 22 [2021-07-13 19:22:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:49,441 INFO L482 AbstractCegarLoop]: Abstraction has 30923 states and 95503 transitions. [2021-07-13 19:22:49,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 30923 states and 95503 transitions. [2021-07-13 19:22:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:49,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:49,450 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:49,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9922,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:49,651 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash -669559449, now seen corresponding path program 213 times [2021-07-13 19:22:49,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:49,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751388805] [2021-07-13 19:22:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:49,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:49,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751388805] [2021-07-13 19:22:49,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751388805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:49,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986844776] [2021-07-13 19:22:49,707 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:49,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:22:49,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:49,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986844776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:49,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:49,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:22:49,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588115309] [2021-07-13 19:22:49,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:49,777 INFO L87 Difference]: Start difference. First operand 30923 states and 95503 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:50,148 INFO L93 Difference]: Finished difference Result 31896 states and 97991 transitions. [2021-07-13 19:22:50,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:22:50,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:50,223 INFO L225 Difference]: With dead ends: 31896 [2021-07-13 19:22:50,223 INFO L226 Difference]: Without dead ends: 31896 [2021-07-13 19:22:50,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:22:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-07-13 19:22:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 30949. [2021-07-13 19:22:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30949 states, 30948 states have (on average 3.0883094222566885) internal successors, (95577), 30948 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30949 states to 30949 states and 95577 transitions. [2021-07-13 19:22:50,885 INFO L78 Accepts]: Start accepts. Automaton has 30949 states and 95577 transitions. Word has length 22 [2021-07-13 19:22:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:50,885 INFO L482 AbstractCegarLoop]: Abstraction has 30949 states and 95577 transitions. [2021-07-13 19:22:50,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 30949 states and 95577 transitions. [2021-07-13 19:22:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:50,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:50,894 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:51,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9923,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:51,095 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1564548045, now seen corresponding path program 214 times [2021-07-13 19:22:51,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:51,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691293073] [2021-07-13 19:22:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:51,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:51,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691293073] [2021-07-13 19:22:51,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691293073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:51,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206322049] [2021-07-13 19:22:51,157 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:51,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:51,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206322049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:51,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:51,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:22:51,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484154888] [2021-07-13 19:22:51,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:51,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:51,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:51,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:51,226 INFO L87 Difference]: Start difference. First operand 30949 states and 95577 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:51,468 INFO L93 Difference]: Finished difference Result 31958 states and 98178 transitions. [2021-07-13 19:22:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:22:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:51,539 INFO L225 Difference]: With dead ends: 31958 [2021-07-13 19:22:51,540 INFO L226 Difference]: Without dead ends: 31958 [2021-07-13 19:22:51,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:22:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31958 states. [2021-07-13 19:22:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31958 to 30995. [2021-07-13 19:22:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30995 states, 30994 states have (on average 3.0880170355552687) internal successors, (95710), 30994 states have internal predecessors, (95710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30995 states to 30995 states and 95710 transitions. [2021-07-13 19:22:52,427 INFO L78 Accepts]: Start accepts. Automaton has 30995 states and 95710 transitions. Word has length 22 [2021-07-13 19:22:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:52,427 INFO L482 AbstractCegarLoop]: Abstraction has 30995 states and 95710 transitions. [2021-07-13 19:22:52,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 30995 states and 95710 transitions. [2021-07-13 19:22:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:52,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:52,436 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:52,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9924,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:52,637 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2102403623, now seen corresponding path program 215 times [2021-07-13 19:22:52,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:52,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491862029] [2021-07-13 19:22:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:52,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:52,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491862029] [2021-07-13 19:22:52,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491862029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:52,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303071814] [2021-07-13 19:22:52,704 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:52,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:22:52,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:52,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:52,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303071814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:52,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:52,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:22:52,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846408215] [2021-07-13 19:22:52,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:52,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:52,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:52,779 INFO L87 Difference]: Start difference. First operand 30995 states and 95710 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:53,035 INFO L93 Difference]: Finished difference Result 36047 states and 110795 transitions. [2021-07-13 19:22:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:22:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:53,110 INFO L225 Difference]: With dead ends: 36047 [2021-07-13 19:22:53,110 INFO L226 Difference]: Without dead ends: 36047 [2021-07-13 19:22:53,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:22:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36047 states. [2021-07-13 19:22:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36047 to 35338. [2021-07-13 19:22:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.0890001980926507) internal successors, (109156), 35337 states have internal predecessors, (109156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 109156 transitions. [2021-07-13 19:22:54,085 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 109156 transitions. Word has length 22 [2021-07-13 19:22:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:54,085 INFO L482 AbstractCegarLoop]: Abstraction has 35338 states and 109156 transitions. [2021-07-13 19:22:54,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 109156 transitions. [2021-07-13 19:22:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:54,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:54,095 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:54,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9925 [2021-07-13 19:22:54,296 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:54,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1596057357, now seen corresponding path program 216 times [2021-07-13 19:22:54,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:54,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220975431] [2021-07-13 19:22:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:54,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:54,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220975431] [2021-07-13 19:22:54,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220975431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:54,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407914371] [2021-07-13 19:22:54,363 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:54,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:22:54,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:54,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:54,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:54,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407914371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:54,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:54,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:22:54,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411926625] [2021-07-13 19:22:54,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:54,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:54,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:54,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:54,436 INFO L87 Difference]: Start difference. First operand 35338 states and 109156 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:54,670 INFO L93 Difference]: Finished difference Result 39264 states and 120741 transitions. [2021-07-13 19:22:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:22:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:54,776 INFO L225 Difference]: With dead ends: 39264 [2021-07-13 19:22:54,776 INFO L226 Difference]: Without dead ends: 39264 [2021-07-13 19:22:54,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39264 states. [2021-07-13 19:22:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39264 to 38914. [2021-07-13 19:22:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 3.083982216739907) internal successors, (120007), 38913 states have internal predecessors, (120007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 120007 transitions. [2021-07-13 19:22:55,788 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 120007 transitions. Word has length 22 [2021-07-13 19:22:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:55,789 INFO L482 AbstractCegarLoop]: Abstraction has 38914 states and 120007 transitions. [2021-07-13 19:22:55,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 120007 transitions. [2021-07-13 19:22:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:55,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:55,801 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:56,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9926,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:56,002 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1215775001, now seen corresponding path program 217 times [2021-07-13 19:22:56,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:56,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139110365] [2021-07-13 19:22:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:56,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:56,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139110365] [2021-07-13 19:22:56,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139110365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:56,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859002922] [2021-07-13 19:22:56,089 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:56,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:56,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:56,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859002922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:56,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:56,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:22:56,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446170384] [2021-07-13 19:22:56,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:22:56,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:56,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:22:56,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:56,160 INFO L87 Difference]: Start difference. First operand 38914 states and 120007 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:56,455 INFO L93 Difference]: Finished difference Result 39365 states and 121002 transitions. [2021-07-13 19:22:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:22:56,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:56,541 INFO L225 Difference]: With dead ends: 39365 [2021-07-13 19:22:56,541 INFO L226 Difference]: Without dead ends: 39365 [2021-07-13 19:22:56,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39365 states. [2021-07-13 19:22:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39365 to 38918. [2021-07-13 19:22:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38918 states, 38917 states have (on average 3.0839735848086955) internal successors, (120019), 38917 states have internal predecessors, (120019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38918 states to 38918 states and 120019 transitions. [2021-07-13 19:22:57,571 INFO L78 Accepts]: Start accepts. Automaton has 38918 states and 120019 transitions. Word has length 22 [2021-07-13 19:22:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:57,571 INFO L482 AbstractCegarLoop]: Abstraction has 38918 states and 120019 transitions. [2021-07-13 19:22:57,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 38918 states and 120019 transitions. [2021-07-13 19:22:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:57,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:57,583 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:57,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9927 [2021-07-13 19:22:57,784 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1811735117, now seen corresponding path program 218 times [2021-07-13 19:22:57,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:57,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306530722] [2021-07-13 19:22:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:57,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:57,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306530722] [2021-07-13 19:22:57,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306530722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:57,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565550714] [2021-07-13 19:22:57,862 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:57,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:57,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:57,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:57,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565550714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:57,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:57,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:22:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916019745] [2021-07-13 19:22:57,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:22:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:22:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:57,934 INFO L87 Difference]: Start difference. First operand 38918 states and 120019 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:58,310 INFO L93 Difference]: Finished difference Result 40630 states and 124791 transitions. [2021-07-13 19:22:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:22:58,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:22:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:58,605 INFO L225 Difference]: With dead ends: 40630 [2021-07-13 19:22:58,605 INFO L226 Difference]: Without dead ends: 40630 [2021-07-13 19:22:58,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:22:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2021-07-13 19:22:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40219. [2021-07-13 19:22:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40219 states, 40218 states have (on average 3.082301457059028) internal successors, (123964), 40218 states have internal predecessors, (123964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40219 states to 40219 states and 123964 transitions. [2021-07-13 19:22:59,431 INFO L78 Accepts]: Start accepts. Automaton has 40219 states and 123964 transitions. Word has length 22 [2021-07-13 19:22:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:59,431 INFO L482 AbstractCegarLoop]: Abstraction has 40219 states and 123964 transitions. [2021-07-13 19:22:59,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 40219 states and 123964 transitions. [2021-07-13 19:22:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:22:59,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:59,445 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:59,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9928,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:59,646 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1175268263, now seen corresponding path program 219 times [2021-07-13 19:22:59,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:59,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053349007] [2021-07-13 19:22:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:59,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:59,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053349007] [2021-07-13 19:22:59,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053349007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:59,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126959510] [2021-07-13 19:22:59,729 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:59,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:22:59,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:59,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:22:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:59,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126959510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:59,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:59,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:22:59,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764903157] [2021-07-13 19:22:59,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:22:59,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:22:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:59,802 INFO L87 Difference]: Start difference. First operand 40219 states and 123964 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:00,448 INFO L93 Difference]: Finished difference Result 42248 states and 129555 transitions. [2021-07-13 19:23:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:23:00,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:00,549 INFO L225 Difference]: With dead ends: 42248 [2021-07-13 19:23:00,549 INFO L226 Difference]: Without dead ends: 42248 [2021-07-13 19:23:00,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:23:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42248 states. [2021-07-13 19:23:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42248 to 41433. [2021-07-13 19:23:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41433 states, 41432 states have (on average 3.080614018150222) internal successors, (127636), 41432 states have internal predecessors, (127636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41433 states to 41433 states and 127636 transitions. [2021-07-13 19:23:01,650 INFO L78 Accepts]: Start accepts. Automaton has 41433 states and 127636 transitions. Word has length 22 [2021-07-13 19:23:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:01,650 INFO L482 AbstractCegarLoop]: Abstraction has 41433 states and 127636 transitions. [2021-07-13 19:23:01,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 41433 states and 127636 transitions. [2021-07-13 19:23:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:01,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:01,667 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:01,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9929,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:01,881 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash -141305647, now seen corresponding path program 220 times [2021-07-13 19:23:01,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:01,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915539653] [2021-07-13 19:23:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:01,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:01,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915539653] [2021-07-13 19:23:01,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915539653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:01,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921624384] [2021-07-13 19:23:01,946 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:01,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:01,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:01,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921624384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:02,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:02,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:23:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157825576] [2021-07-13 19:23:02,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:23:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:23:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:23:02,005 INFO L87 Difference]: Start difference. First operand 41433 states and 127636 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:02,385 INFO L93 Difference]: Finished difference Result 41740 states and 128184 transitions. [2021-07-13 19:23:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:23:02,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:02,473 INFO L225 Difference]: With dead ends: 41740 [2021-07-13 19:23:02,473 INFO L226 Difference]: Without dead ends: 41734 [2021-07-13 19:23:02,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:23:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41734 states. [2021-07-13 19:23:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41734 to 40967. [2021-07-13 19:23:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40967 states, 40966 states have (on average 3.0791632085143776) internal successors, (126141), 40966 states have internal predecessors, (126141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40967 states to 40967 states and 126141 transitions. [2021-07-13 19:23:03,553 INFO L78 Accepts]: Start accepts. Automaton has 40967 states and 126141 transitions. Word has length 22 [2021-07-13 19:23:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:03,553 INFO L482 AbstractCegarLoop]: Abstraction has 40967 states and 126141 transitions. [2021-07-13 19:23:03,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 40967 states and 126141 transitions. [2021-07-13 19:23:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:03,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:03,567 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:03,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9930 [2021-07-13 19:23:03,768 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash 429354799, now seen corresponding path program 221 times [2021-07-13 19:23:03,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:03,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272181944] [2021-07-13 19:23:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:03,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:03,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272181944] [2021-07-13 19:23:03,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272181944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:03,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623494950] [2021-07-13 19:23:03,830 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:03,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:23:03,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:03,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623494950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:03,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:03,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:23:03,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830513559] [2021-07-13 19:23:03,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:23:03,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:03,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:23:03,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:23:03,896 INFO L87 Difference]: Start difference. First operand 40967 states and 126141 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:04,144 INFO L93 Difference]: Finished difference Result 46670 states and 143099 transitions. [2021-07-13 19:23:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:23:04,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:04,243 INFO L225 Difference]: With dead ends: 46670 [2021-07-13 19:23:04,243 INFO L226 Difference]: Without dead ends: 46670 [2021-07-13 19:23:04,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:23:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2021-07-13 19:23:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 45904. [2021-07-13 19:23:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45904 states, 45903 states have (on average 3.0725224930832407) internal successors, (141038), 45903 states have internal predecessors, (141038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45904 states to 45904 states and 141038 transitions. [2021-07-13 19:23:05,430 INFO L78 Accepts]: Start accepts. Automaton has 45904 states and 141038 transitions. Word has length 22 [2021-07-13 19:23:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:05,430 INFO L482 AbstractCegarLoop]: Abstraction has 45904 states and 141038 transitions. [2021-07-13 19:23:05,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 45904 states and 141038 transitions. [2021-07-13 19:23:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:05,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:05,447 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:05,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9931,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:05,647 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:05,648 INFO L82 PathProgramCache]: Analyzing trace with hash -76991467, now seen corresponding path program 222 times [2021-07-13 19:23:05,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:05,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980816292] [2021-07-13 19:23:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:05,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:05,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980816292] [2021-07-13 19:23:05,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980816292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:05,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788937616] [2021-07-13 19:23:05,719 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:05,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:23:05,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:05,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:05,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788937616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:05,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:05,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:23:05,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641737108] [2021-07-13 19:23:05,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:05,784 INFO L87 Difference]: Start difference. First operand 45904 states and 141038 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:06,300 INFO L93 Difference]: Finished difference Result 49343 states and 151040 transitions. [2021-07-13 19:23:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:06,432 INFO L225 Difference]: With dead ends: 49343 [2021-07-13 19:23:06,432 INFO L226 Difference]: Without dead ends: 49343 [2021-07-13 19:23:06,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:23:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49343 states. [2021-07-13 19:23:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49343 to 46131. [2021-07-13 19:23:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46131 states, 46130 states have (on average 3.0718621287665293) internal successors, (141705), 46130 states have internal predecessors, (141705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46131 states to 46131 states and 141705 transitions. [2021-07-13 19:23:07,726 INFO L78 Accepts]: Start accepts. Automaton has 46131 states and 141705 transitions. Word has length 22 [2021-07-13 19:23:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:07,726 INFO L482 AbstractCegarLoop]: Abstraction has 46131 states and 141705 transitions. [2021-07-13 19:23:07,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 46131 states and 141705 transitions. [2021-07-13 19:23:07,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:07,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:07,743 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:07,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9932 [2021-07-13 19:23:07,944 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1406143471, now seen corresponding path program 223 times [2021-07-13 19:23:07,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:07,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338061310] [2021-07-13 19:23:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:08,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:08,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338061310] [2021-07-13 19:23:08,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338061310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:08,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439687426] [2021-07-13 19:23:08,016 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:08,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:08,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439687426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:08,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:08,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:23:08,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507074533] [2021-07-13 19:23:08,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:08,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:08,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:08,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:08,079 INFO L87 Difference]: Start difference. First operand 46131 states and 141705 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:08,472 INFO L93 Difference]: Finished difference Result 55150 states and 168573 transitions. [2021-07-13 19:23:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:08,618 INFO L225 Difference]: With dead ends: 55150 [2021-07-13 19:23:08,619 INFO L226 Difference]: Without dead ends: 55150 [2021-07-13 19:23:08,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:23:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55150 states. [2021-07-13 19:23:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55150 to 52518. [2021-07-13 19:23:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52518 states, 52517 states have (on average 3.067406744482739) internal successors, (161091), 52517 states have internal predecessors, (161091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52518 states to 52518 states and 161091 transitions. [2021-07-13 19:23:10,243 INFO L78 Accepts]: Start accepts. Automaton has 52518 states and 161091 transitions. Word has length 22 [2021-07-13 19:23:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:10,243 INFO L482 AbstractCegarLoop]: Abstraction has 52518 states and 161091 transitions. [2021-07-13 19:23:10,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 52518 states and 161091 transitions. [2021-07-13 19:23:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:10,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:10,263 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:10,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9933,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:10,463 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:10,463 INFO L82 PathProgramCache]: Analyzing trace with hash 138686293, now seen corresponding path program 224 times [2021-07-13 19:23:10,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:10,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701499865] [2021-07-13 19:23:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:10,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:10,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701499865] [2021-07-13 19:23:10,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701499865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:10,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398317425] [2021-07-13 19:23:10,540 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:10,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:10,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:10,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398317425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:10,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:10,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:23:10,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310389034] [2021-07-13 19:23:10,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:10,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:10,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:10,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:10,605 INFO L87 Difference]: Start difference. First operand 52518 states and 161091 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:11,163 INFO L93 Difference]: Finished difference Result 68037 states and 207399 transitions. [2021-07-13 19:23:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:23:11,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:11,601 INFO L225 Difference]: With dead ends: 68037 [2021-07-13 19:23:11,602 INFO L226 Difference]: Without dead ends: 68037 [2021-07-13 19:23:11,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:23:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states. [2021-07-13 19:23:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68037 to 63418. [2021-07-13 19:23:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63418 states, 63417 states have (on average 3.060788116751029) internal successors, (194106), 63417 states have internal predecessors, (194106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63418 states to 63418 states and 194106 transitions. [2021-07-13 19:23:13,073 INFO L78 Accepts]: Start accepts. Automaton has 63418 states and 194106 transitions. Word has length 22 [2021-07-13 19:23:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:13,074 INFO L482 AbstractCegarLoop]: Abstraction has 63418 states and 194106 transitions. [2021-07-13 19:23:13,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 63418 states and 194106 transitions. [2021-07-13 19:23:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:13,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:13,094 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:13,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9934,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:13,295 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash -353147191, now seen corresponding path program 225 times [2021-07-13 19:23:13,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:13,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500035692] [2021-07-13 19:23:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:13,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:13,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500035692] [2021-07-13 19:23:13,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500035692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:13,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289125462] [2021-07-13 19:23:13,367 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:13,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:23:13,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:13,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:13,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:13,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289125462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:13,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:13,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:13,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301675168] [2021-07-13 19:23:13,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:13,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:13,442 INFO L87 Difference]: Start difference. First operand 63418 states and 194106 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:14,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:14,177 INFO L93 Difference]: Finished difference Result 75602 states and 230264 transitions. [2021-07-13 19:23:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:23:14,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:14,376 INFO L225 Difference]: With dead ends: 75602 [2021-07-13 19:23:14,376 INFO L226 Difference]: Without dead ends: 75602 [2021-07-13 19:23:14,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:23:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75602 states. [2021-07-13 19:23:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75602 to 53421. [2021-07-13 19:23:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 3.0645638337701238) internal successors, (163709), 53420 states have internal predecessors, (163709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 163709 transitions. [2021-07-13 19:23:16,004 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 163709 transitions. Word has length 22 [2021-07-13 19:23:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:16,004 INFO L482 AbstractCegarLoop]: Abstraction has 53421 states and 163709 transitions. [2021-07-13 19:23:16,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 163709 transitions. [2021-07-13 19:23:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:16,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:16,021 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:16,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9935,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:16,222 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:16,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:16,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1620604369, now seen corresponding path program 226 times [2021-07-13 19:23:16,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:16,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262006562] [2021-07-13 19:23:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:16,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262006562] [2021-07-13 19:23:16,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262006562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099255210] [2021-07-13 19:23:16,498 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:16,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:16,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:16,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:16,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099255210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:16,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:16,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:16,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101127727] [2021-07-13 19:23:16,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:16,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:16,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:16,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:16,606 INFO L87 Difference]: Start difference. First operand 53421 states and 163709 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:17,171 INFO L93 Difference]: Finished difference Result 68985 states and 210204 transitions. [2021-07-13 19:23:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:23:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:17,340 INFO L225 Difference]: With dead ends: 68985 [2021-07-13 19:23:17,340 INFO L226 Difference]: Without dead ends: 68985 [2021-07-13 19:23:17,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:23:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68985 states. [2021-07-13 19:23:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68985 to 46695. [2021-07-13 19:23:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46695 states, 46694 states have (on average 3.0735426393112606) internal successors, (143516), 46694 states have internal predecessors, (143516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46695 states to 46695 states and 143516 transitions. [2021-07-13 19:23:18,739 INFO L78 Accepts]: Start accepts. Automaton has 46695 states and 143516 transitions. Word has length 22 [2021-07-13 19:23:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:18,739 INFO L482 AbstractCegarLoop]: Abstraction has 46695 states and 143516 transitions. [2021-07-13 19:23:18,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 46695 states and 143516 transitions. [2021-07-13 19:23:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:18,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:18,755 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:18,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9936,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:18,956 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash 414428143, now seen corresponding path program 227 times [2021-07-13 19:23:18,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:18,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169997321] [2021-07-13 19:23:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:19,137 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:23:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:19,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:19,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169997321] [2021-07-13 19:23:19,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169997321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:19,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478897298] [2021-07-13 19:23:19,215 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:19,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:23:19,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:19,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:19,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:19,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478897298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:19,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:19,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:23:19,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183901928] [2021-07-13 19:23:19,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:19,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:19,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:19,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:19,287 INFO L87 Difference]: Start difference. First operand 46695 states and 143516 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:19,603 INFO L93 Difference]: Finished difference Result 49438 states and 151354 transitions. [2021-07-13 19:23:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:19,734 INFO L225 Difference]: With dead ends: 49438 [2021-07-13 19:23:19,734 INFO L226 Difference]: Without dead ends: 49438 [2021-07-13 19:23:19,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:23:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-07-13 19:23:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 36426. [2021-07-13 19:23:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36426 states, 36425 states have (on average 3.0824433768016473) internal successors, (112278), 36425 states have internal predecessors, (112278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36426 states to 36426 states and 112278 transitions. [2021-07-13 19:23:20,891 INFO L78 Accepts]: Start accepts. Automaton has 36426 states and 112278 transitions. Word has length 22 [2021-07-13 19:23:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:20,891 INFO L482 AbstractCegarLoop]: Abstraction has 36426 states and 112278 transitions. [2021-07-13 19:23:20,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36426 states and 112278 transitions. [2021-07-13 19:23:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:20,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:20,902 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:21,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9937 [2021-07-13 19:23:21,103 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:21,103 INFO L82 PathProgramCache]: Analyzing trace with hash -91918123, now seen corresponding path program 228 times [2021-07-13 19:23:21,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:21,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610467295] [2021-07-13 19:23:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:21,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:21,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610467295] [2021-07-13 19:23:21,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610467295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:21,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79924034] [2021-07-13 19:23:21,169 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:21,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:23:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:21,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:21,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79924034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:21,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:21,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:23:21,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61302532] [2021-07-13 19:23:21,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:21,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:21,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:21,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:21,261 INFO L87 Difference]: Start difference. First operand 36426 states and 112278 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:21,491 INFO L93 Difference]: Finished difference Result 38526 states and 118284 transitions. [2021-07-13 19:23:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:23:21,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:21,579 INFO L225 Difference]: With dead ends: 38526 [2021-07-13 19:23:21,580 INFO L226 Difference]: Without dead ends: 38526 [2021-07-13 19:23:21,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2021-07-13 19:23:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38139. [2021-07-13 19:23:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38139 states, 38138 states have (on average 3.0788976873459544) internal successors, (117423), 38138 states have internal predecessors, (117423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38139 states to 38139 states and 117423 transitions. [2021-07-13 19:23:22,598 INFO L78 Accepts]: Start accepts. Automaton has 38139 states and 117423 transitions. Word has length 22 [2021-07-13 19:23:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:22,598 INFO L482 AbstractCegarLoop]: Abstraction has 38139 states and 117423 transitions. [2021-07-13 19:23:22,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 38139 states and 117423 transitions. [2021-07-13 19:23:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:22,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:22,611 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:22,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9938,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:22,812 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1391216815, now seen corresponding path program 229 times [2021-07-13 19:23:22,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:22,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399250459] [2021-07-13 19:23:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:22,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:22,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399250459] [2021-07-13 19:23:22,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399250459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:22,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667490239] [2021-07-13 19:23:22,885 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:22,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667490239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:22,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:22,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:22,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636255846] [2021-07-13 19:23:22,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:22,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:22,958 INFO L87 Difference]: Start difference. First operand 38139 states and 117423 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:23,262 INFO L93 Difference]: Finished difference Result 38877 states and 119237 transitions. [2021-07-13 19:23:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:23:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:23,343 INFO L225 Difference]: With dead ends: 38877 [2021-07-13 19:23:23,343 INFO L226 Difference]: Without dead ends: 38877 [2021-07-13 19:23:23,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:23,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states. [2021-07-13 19:23:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38877 to 37259. [2021-07-13 19:23:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 3.0800096623543936) internal successors, (114755), 37258 states have internal predecessors, (114755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 114755 transitions. [2021-07-13 19:23:24,445 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 114755 transitions. Word has length 22 [2021-07-13 19:23:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:24,446 INFO L482 AbstractCegarLoop]: Abstraction has 37259 states and 114755 transitions. [2021-07-13 19:23:24,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 114755 transitions. [2021-07-13 19:23:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:24,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:24,460 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:24,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9939 [2021-07-13 19:23:24,683 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 123759637, now seen corresponding path program 230 times [2021-07-13 19:23:24,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:24,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552384737] [2021-07-13 19:23:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:24,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552384737] [2021-07-13 19:23:24,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552384737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35561351] [2021-07-13 19:23:24,759 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:24,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:24,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:24,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:24,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35561351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:24,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:24,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:24,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172715232] [2021-07-13 19:23:24,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:24,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:24,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:24,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:24,831 INFO L87 Difference]: Start difference. First operand 37259 states and 114755 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:25,205 INFO L93 Difference]: Finished difference Result 39004 states and 119600 transitions. [2021-07-13 19:23:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:23:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:25,506 INFO L225 Difference]: With dead ends: 39004 [2021-07-13 19:23:25,506 INFO L226 Difference]: Without dead ends: 39004 [2021-07-13 19:23:25,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:23:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39004 states. [2021-07-13 19:23:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39004 to 37661. [2021-07-13 19:23:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37661 states, 37660 states have (on average 3.0793414763674987) internal successors, (115968), 37660 states have internal predecessors, (115968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37661 states to 37661 states and 115968 transitions. [2021-07-13 19:23:26,306 INFO L78 Accepts]: Start accepts. Automaton has 37661 states and 115968 transitions. Word has length 22 [2021-07-13 19:23:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:26,306 INFO L482 AbstractCegarLoop]: Abstraction has 37661 states and 115968 transitions. [2021-07-13 19:23:26,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 37661 states and 115968 transitions. [2021-07-13 19:23:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:26,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:26,318 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:26,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9940 [2021-07-13 19:23:26,519 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash -512707217, now seen corresponding path program 231 times [2021-07-13 19:23:26,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:26,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232534693] [2021-07-13 19:23:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:26,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:26,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232534693] [2021-07-13 19:23:26,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232534693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:26,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034247025] [2021-07-13 19:23:26,597 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:26,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:23:26,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:26,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:26,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034247025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:26,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:26,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:26,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771422542] [2021-07-13 19:23:26,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:26,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:26,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:26,684 INFO L87 Difference]: Start difference. First operand 37661 states and 115968 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:27,350 INFO L93 Difference]: Finished difference Result 39220 states and 120135 transitions. [2021-07-13 19:23:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:23:27,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:27,444 INFO L225 Difference]: With dead ends: 39220 [2021-07-13 19:23:27,445 INFO L226 Difference]: Without dead ends: 39220 [2021-07-13 19:23:27,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:23:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39220 states. [2021-07-13 19:23:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39220 to 37458. [2021-07-13 19:23:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.08011853592119) internal successors, (115372), 37457 states have internal predecessors, (115372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115372 transitions. [2021-07-13 19:23:28,276 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115372 transitions. Word has length 22 [2021-07-13 19:23:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:28,276 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115372 transitions. [2021-07-13 19:23:28,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115372 transitions. [2021-07-13 19:23:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:28,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:28,288 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:28,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9941 [2021-07-13 19:23:28,489 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:28,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2054510059, now seen corresponding path program 232 times [2021-07-13 19:23:28,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:28,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453762293] [2021-07-13 19:23:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:28,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:28,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453762293] [2021-07-13 19:23:28,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453762293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:28,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544479022] [2021-07-13 19:23:28,542 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:28,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:28,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:28,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:28,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544479022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:28,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:28,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:23:28,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562273206] [2021-07-13 19:23:28,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:28,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:28,602 INFO L87 Difference]: Start difference. First operand 37458 states and 115372 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:29,099 INFO L93 Difference]: Finished difference Result 37627 states and 115565 transitions. [2021-07-13 19:23:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:23:29,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:29,171 INFO L225 Difference]: With dead ends: 37627 [2021-07-13 19:23:29,172 INFO L226 Difference]: Without dead ends: 37623 [2021-07-13 19:23:29,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:23:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37623 states. [2021-07-13 19:23:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37623 to 37458. [2021-07-13 19:23:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.0800117468030006) internal successors, (115368), 37457 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115368 transitions. [2021-07-13 19:23:30,009 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115368 transitions. Word has length 22 [2021-07-13 19:23:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:30,009 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115368 transitions. [2021-07-13 19:23:30,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115368 transitions. [2021-07-13 19:23:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:30,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:30,021 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:30,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9942 [2021-07-13 19:23:30,222 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:30,222 INFO L82 PathProgramCache]: Analyzing trace with hash -324040043, now seen corresponding path program 233 times [2021-07-13 19:23:30,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:30,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403003209] [2021-07-13 19:23:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:30,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403003209] [2021-07-13 19:23:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403003209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456851175] [2021-07-13 19:23:30,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:30,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:23:30,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:30,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456851175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:30,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:30,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:30,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720414757] [2021-07-13 19:23:30,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:30,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:30,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:30,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:30,381 INFO L87 Difference]: Start difference. First operand 37458 states and 115368 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:30,993 INFO L93 Difference]: Finished difference Result 44126 states and 134929 transitions. [2021-07-13 19:23:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:23:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:31,087 INFO L225 Difference]: With dead ends: 44126 [2021-07-13 19:23:31,087 INFO L226 Difference]: Without dead ends: 44126 [2021-07-13 19:23:31,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 436.9ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:23:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44126 states. [2021-07-13 19:23:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44126 to 42198. [2021-07-13 19:23:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42198 states, 42197 states have (on average 3.0731331611251984) internal successors, (129677), 42197 states have internal predecessors, (129677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42198 states to 42198 states and 129677 transitions. [2021-07-13 19:23:32,239 INFO L78 Accepts]: Start accepts. Automaton has 42198 states and 129677 transitions. Word has length 22 [2021-07-13 19:23:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:32,239 INFO L482 AbstractCegarLoop]: Abstraction has 42198 states and 129677 transitions. [2021-07-13 19:23:32,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 42198 states and 129677 transitions. [2021-07-13 19:23:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:32,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:32,256 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:32,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9943,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:32,461 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1420323963, now seen corresponding path program 234 times [2021-07-13 19:23:32,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:32,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122019003] [2021-07-13 19:23:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:32,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:32,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122019003] [2021-07-13 19:23:32,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122019003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:32,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610011495] [2021-07-13 19:23:32,537 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:32,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:23:32,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:32,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:32,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610011495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:32,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:32,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:32,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110729737] [2021-07-13 19:23:32,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:32,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:32,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:32,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:32,609 INFO L87 Difference]: Start difference. First operand 42198 states and 129677 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:33,003 INFO L93 Difference]: Finished difference Result 46244 states and 141435 transitions. [2021-07-13 19:23:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:23:33,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:33,115 INFO L225 Difference]: With dead ends: 46244 [2021-07-13 19:23:33,115 INFO L226 Difference]: Without dead ends: 46244 [2021-07-13 19:23:33,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:23:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2021-07-13 19:23:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 45504. [2021-07-13 19:23:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45504 states, 45503 states have (on average 3.068566907676417) internal successors, (139629), 45503 states have internal predecessors, (139629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45504 states to 45504 states and 139629 transitions. [2021-07-13 19:23:34,287 INFO L78 Accepts]: Start accepts. Automaton has 45504 states and 139629 transitions. Word has length 22 [2021-07-13 19:23:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:34,287 INFO L482 AbstractCegarLoop]: Abstraction has 45504 states and 139629 transitions. [2021-07-13 19:23:34,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 45504 states and 139629 transitions. [2021-07-13 19:23:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:34,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:34,306 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:34,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9944,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:34,507 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash 783857109, now seen corresponding path program 235 times [2021-07-13 19:23:34,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:34,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355361287] [2021-07-13 19:23:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:34,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:34,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355361287] [2021-07-13 19:23:34,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355361287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:34,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125392699] [2021-07-13 19:23:34,601 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:34,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125392699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:34,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:34,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:34,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447427561] [2021-07-13 19:23:34,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:34,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:34,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:34,687 INFO L87 Difference]: Start difference. First operand 45504 states and 139629 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:35,371 INFO L93 Difference]: Finished difference Result 47891 states and 146334 transitions. [2021-07-13 19:23:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:23:35,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:35,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:35,487 INFO L225 Difference]: With dead ends: 47891 [2021-07-13 19:23:35,487 INFO L226 Difference]: Without dead ends: 47891 [2021-07-13 19:23:35,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:23:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47891 states. [2021-07-13 19:23:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47891 to 46839. [2021-07-13 19:23:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46839 states, 46838 states have (on average 3.066612579529442) internal successors, (143634), 46838 states have internal predecessors, (143634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46839 states to 46839 states and 143634 transitions. [2021-07-13 19:23:36,686 INFO L78 Accepts]: Start accepts. Automaton has 46839 states and 143634 transitions. Word has length 22 [2021-07-13 19:23:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:36,686 INFO L482 AbstractCegarLoop]: Abstraction has 46839 states and 143634 transitions. [2021-07-13 19:23:36,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 46839 states and 143634 transitions. [2021-07-13 19:23:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:36,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:36,705 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:36,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9945,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:36,906 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:36,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1486004305, now seen corresponding path program 236 times [2021-07-13 19:23:36,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:36,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650813650] [2021-07-13 19:23:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:36,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:36,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650813650] [2021-07-13 19:23:36,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650813650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:36,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160315244] [2021-07-13 19:23:36,961 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:36,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:36,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:36,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:36,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160315244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:37,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:37,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:23:37,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526894588] [2021-07-13 19:23:37,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:37,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:37,021 INFO L87 Difference]: Start difference. First operand 46839 states and 143634 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:37,360 INFO L93 Difference]: Finished difference Result 47040 states and 143931 transitions. [2021-07-13 19:23:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:23:37,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:37,704 INFO L225 Difference]: With dead ends: 47040 [2021-07-13 19:23:37,704 INFO L226 Difference]: Without dead ends: 47036 [2021-07-13 19:23:37,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:23:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47036 states. [2021-07-13 19:23:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47036 to 46875. [2021-07-13 19:23:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46875 states, 46874 states have (on average 3.066646755130776) internal successors, (143746), 46874 states have internal predecessors, (143746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46875 states to 46875 states and 143746 transitions. [2021-07-13 19:23:38,724 INFO L78 Accepts]: Start accepts. Automaton has 46875 states and 143746 transitions. Word has length 22 [2021-07-13 19:23:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:38,724 INFO L482 AbstractCegarLoop]: Abstraction has 46875 states and 143746 transitions. [2021-07-13 19:23:38,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 46875 states and 143746 transitions. [2021-07-13 19:23:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:38,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:38,742 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:38,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9946,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:38,943 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:38,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1091213931, now seen corresponding path program 237 times [2021-07-13 19:23:38,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:38,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445723756] [2021-07-13 19:23:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:39,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:39,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445723756] [2021-07-13 19:23:39,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445723756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932620927] [2021-07-13 19:23:39,007 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:39,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:23:39,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:39,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932620927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:39,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:39,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:23:39,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737346425] [2021-07-13 19:23:39,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:39,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:39,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:39,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:39,232 INFO L87 Difference]: Start difference. First operand 46875 states and 143746 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:39,516 INFO L93 Difference]: Finished difference Result 47717 states and 145917 transitions. [2021-07-13 19:23:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:23:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:39,633 INFO L225 Difference]: With dead ends: 47717 [2021-07-13 19:23:39,633 INFO L226 Difference]: Without dead ends: 47717 [2021-07-13 19:23:39,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:23:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47717 states. [2021-07-13 19:23:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47717 to 46880. [2021-07-13 19:23:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46880 states, 46879 states have (on average 3.066639646750144) internal successors, (143761), 46879 states have internal predecessors, (143761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46880 states to 46880 states and 143761 transitions. [2021-07-13 19:23:40,831 INFO L78 Accepts]: Start accepts. Automaton has 46880 states and 143761 transitions. Word has length 22 [2021-07-13 19:23:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:40,831 INFO L482 AbstractCegarLoop]: Abstraction has 46880 states and 143761 transitions. [2021-07-13 19:23:40,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 46880 states and 143761 transitions. [2021-07-13 19:23:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:40,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:40,850 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:41,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9947,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:41,051 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1474706031, now seen corresponding path program 238 times [2021-07-13 19:23:41,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:41,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196458814] [2021-07-13 19:23:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:41,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196458814] [2021-07-13 19:23:41,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196458814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692623240] [2021-07-13 19:23:41,108 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:41,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:41,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:41,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:41,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:41,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692623240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:41,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:41,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:23:41,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806343299] [2021-07-13 19:23:41,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:23:41,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:23:41,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:23:41,177 INFO L87 Difference]: Start difference. First operand 46880 states and 143761 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:41,724 INFO L93 Difference]: Finished difference Result 48348 states and 147772 transitions. [2021-07-13 19:23:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:41,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:41,849 INFO L225 Difference]: With dead ends: 48348 [2021-07-13 19:23:41,849 INFO L226 Difference]: Without dead ends: 48348 [2021-07-13 19:23:41,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:23:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48348 states. [2021-07-13 19:23:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48348 to 46887. [2021-07-13 19:23:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46887 states, 46886 states have (on average 3.066608369236019) internal successors, (143781), 46886 states have internal predecessors, (143781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46887 states to 46887 states and 143781 transitions. [2021-07-13 19:23:42,848 INFO L78 Accepts]: Start accepts. Automaton has 46887 states and 143781 transitions. Word has length 22 [2021-07-13 19:23:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:42,848 INFO L482 AbstractCegarLoop]: Abstraction has 46887 states and 143781 transitions. [2021-07-13 19:23:42,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 46887 states and 143781 transitions. [2021-07-13 19:23:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:42,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:42,867 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:43,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9948 [2021-07-13 19:23:43,067 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash -586153771, now seen corresponding path program 239 times [2021-07-13 19:23:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:43,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324086039] [2021-07-13 19:23:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:43,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:43,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324086039] [2021-07-13 19:23:43,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324086039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:43,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377130858] [2021-07-13 19:23:43,289 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:43,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:23:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:43,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377130858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:43,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:43,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:23:43,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386983356] [2021-07-13 19:23:43,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:23:43,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:43,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:23:43,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:23:43,383 INFO L87 Difference]: Start difference. First operand 46887 states and 143781 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:43,795 INFO L93 Difference]: Finished difference Result 64639 states and 196977 transitions. [2021-07-13 19:23:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:43,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:43,975 INFO L225 Difference]: With dead ends: 64639 [2021-07-13 19:23:43,975 INFO L226 Difference]: Without dead ends: 64639 [2021-07-13 19:23:43,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:23:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64639 states. [2021-07-13 19:23:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64639 to 61565. [2021-07-13 19:23:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 61564 states have (on average 3.058508219089078) internal successors, (188294), 61564 states have internal predecessors, (188294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 188294 transitions. [2021-07-13 19:23:45,789 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 188294 transitions. Word has length 22 [2021-07-13 19:23:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:45,789 INFO L482 AbstractCegarLoop]: Abstraction has 61565 states and 188294 transitions. [2021-07-13 19:23:45,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 188294 transitions. [2021-07-13 19:23:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:45,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:45,811 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:46,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9949,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:46,012 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:46,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:46,012 INFO L82 PathProgramCache]: Analyzing trace with hash -48298193, now seen corresponding path program 240 times [2021-07-13 19:23:46,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:46,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214075041] [2021-07-13 19:23:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:46,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:46,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214075041] [2021-07-13 19:23:46,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214075041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:46,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627079700] [2021-07-13 19:23:46,076 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:46,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:23:46,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:46,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:46,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627079700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:46,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:46,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:23:46,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912617180] [2021-07-13 19:23:46,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:46,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:46,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:46,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:46,149 INFO L87 Difference]: Start difference. First operand 61565 states and 188294 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:46,560 INFO L93 Difference]: Finished difference Result 64066 states and 195284 transitions. [2021-07-13 19:23:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:23:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:47,020 INFO L225 Difference]: With dead ends: 64066 [2021-07-13 19:23:47,021 INFO L226 Difference]: Without dead ends: 64066 [2021-07-13 19:23:47,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64066 states. [2021-07-13 19:23:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64066 to 61726. [2021-07-13 19:23:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61726 states, 61725 states have (on average 3.0580639935196436) internal successors, (188759), 61725 states have internal predecessors, (188759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 188759 transitions. [2021-07-13 19:23:48,484 INFO L78 Accepts]: Start accepts. Automaton has 61726 states and 188759 transitions. Word has length 22 [2021-07-13 19:23:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:48,484 INFO L482 AbstractCegarLoop]: Abstraction has 61726 states and 188759 transitions. [2021-07-13 19:23:48,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 61726 states and 188759 transitions. [2021-07-13 19:23:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:48,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:48,511 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:48,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9950 [2021-07-13 19:23:48,732 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash -554644459, now seen corresponding path program 241 times [2021-07-13 19:23:48,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:48,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662307287] [2021-07-13 19:23:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:48,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:48,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662307287] [2021-07-13 19:23:48,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662307287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:48,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500480260] [2021-07-13 19:23:48,811 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:48,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:48,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500480260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:48,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:48,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:23:48,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181282668] [2021-07-13 19:23:48,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:48,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:48,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:48,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:48,894 INFO L87 Difference]: Start difference. First operand 61726 states and 188759 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:49,602 INFO L93 Difference]: Finished difference Result 73057 states and 222493 transitions. [2021-07-13 19:23:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:49,783 INFO L225 Difference]: With dead ends: 73057 [2021-07-13 19:23:49,783 INFO L226 Difference]: Without dead ends: 73057 [2021-07-13 19:23:49,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:23:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73057 states. [2021-07-13 19:23:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73057 to 71622. [2021-07-13 19:23:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71622 states, 71621 states have (on average 3.051926111056813) internal successors, (218582), 71621 states have internal predecessors, (218582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71622 states to 71622 states and 218582 transitions. [2021-07-13 19:23:51,832 INFO L78 Accepts]: Start accepts. Automaton has 71622 states and 218582 transitions. Word has length 22 [2021-07-13 19:23:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:51,832 INFO L482 AbstractCegarLoop]: Abstraction has 71622 states and 218582 transitions. [2021-07-13 19:23:51,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 71622 states and 218582 transitions. [2021-07-13 19:23:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:51,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:51,857 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:52,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9951 [2021-07-13 19:23:52,058 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:52,058 INFO L82 PathProgramCache]: Analyzing trace with hash 928490479, now seen corresponding path program 242 times [2021-07-13 19:23:52,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:52,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972611387] [2021-07-13 19:23:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:52,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972611387] [2021-07-13 19:23:52,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972611387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869479685] [2021-07-13 19:23:52,128 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:52,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:52,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:52,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:52,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869479685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:52,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:52,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:23:52,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936421927] [2021-07-13 19:23:52,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:52,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:52,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:52,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:52,200 INFO L87 Difference]: Start difference. First operand 71622 states and 218582 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:52,945 INFO L93 Difference]: Finished difference Result 76219 states and 232111 transitions. [2021-07-13 19:23:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:23:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:53,175 INFO L225 Difference]: With dead ends: 76219 [2021-07-13 19:23:53,175 INFO L226 Difference]: Without dead ends: 76219 [2021-07-13 19:23:53,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:23:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76219 states. [2021-07-13 19:23:54,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76219 to 75735. [2021-07-13 19:23:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75735 states, 75734 states have (on average 3.0491588982491353) internal successors, (230925), 75734 states have internal predecessors, (230925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75735 states to 75735 states and 230925 transitions. [2021-07-13 19:23:55,269 INFO L78 Accepts]: Start accepts. Automaton has 75735 states and 230925 transitions. Word has length 22 [2021-07-13 19:23:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:55,269 INFO L482 AbstractCegarLoop]: Abstraction has 75735 states and 230925 transitions. [2021-07-13 19:23:55,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 75735 states and 230925 transitions. [2021-07-13 19:23:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:55,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:55,298 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:55,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9952 [2021-07-13 19:23:55,498 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:55,499 INFO L82 PathProgramCache]: Analyzing trace with hash -338966699, now seen corresponding path program 243 times [2021-07-13 19:23:55,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:55,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793741229] [2021-07-13 19:23:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:55,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:55,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793741229] [2021-07-13 19:23:55,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793741229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:55,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326777011] [2021-07-13 19:23:55,576 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:55,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:23:55,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:55,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:55,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:55,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326777011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:55,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:55,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:55,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929167994] [2021-07-13 19:23:55,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:55,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:55,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:55,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:55,649 INFO L87 Difference]: Start difference. First operand 75735 states and 230925 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:56,453 INFO L93 Difference]: Finished difference Result 76769 states and 233709 transitions. [2021-07-13 19:23:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:23:56,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:56,667 INFO L225 Difference]: With dead ends: 76769 [2021-07-13 19:23:56,667 INFO L226 Difference]: Without dead ends: 76769 [2021-07-13 19:23:56,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:23:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76769 states. [2021-07-13 19:23:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76769 to 75772. [2021-07-13 19:23:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75771 states have (on average 3.0491348932969076) internal successors, (231036), 75771 states have internal predecessors, (231036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 231036 transitions. [2021-07-13 19:23:58,717 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 231036 transitions. Word has length 22 [2021-07-13 19:23:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:58,717 INFO L482 AbstractCegarLoop]: Abstraction has 75772 states and 231036 transitions. [2021-07-13 19:23:58,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 231036 transitions. [2021-07-13 19:23:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:23:58,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:58,743 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:58,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9953 [2021-07-13 19:23:58,944 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:58,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:58,944 INFO L82 PathProgramCache]: Analyzing trace with hash -975433553, now seen corresponding path program 244 times [2021-07-13 19:23:58,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:58,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469384423] [2021-07-13 19:23:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:59,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:59,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469384423] [2021-07-13 19:23:59,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469384423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:59,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3917046] [2021-07-13 19:23:59,024 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:59,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:59,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:23:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:59,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3917046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:59,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:59,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:23:59,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597603846] [2021-07-13 19:23:59,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:59,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:59,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:59,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:59,097 INFO L87 Difference]: Start difference. First operand 75772 states and 231036 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:59,986 INFO L93 Difference]: Finished difference Result 77589 states and 236129 transitions. [2021-07-13 19:23:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:23:59,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:23:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:00,208 INFO L225 Difference]: With dead ends: 77589 [2021-07-13 19:24:00,208 INFO L226 Difference]: Without dead ends: 77589 [2021-07-13 19:24:00,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:24:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-07-13 19:24:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 76898. [2021-07-13 19:24:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76898 states, 76897 states have (on average 3.048415412824948) internal successors, (234414), 76897 states have internal predecessors, (234414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76898 states to 76898 states and 234414 transitions. [2021-07-13 19:24:02,288 INFO L78 Accepts]: Start accepts. Automaton has 76898 states and 234414 transitions. Word has length 22 [2021-07-13 19:24:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:02,288 INFO L482 AbstractCegarLoop]: Abstraction has 76898 states and 234414 transitions. [2021-07-13 19:24:02,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 76898 states and 234414 transitions. [2021-07-13 19:24:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:02,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:02,314 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:02,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9954,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:02,515 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash 768930453, now seen corresponding path program 245 times [2021-07-13 19:24:02,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:02,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512115295] [2021-07-13 19:24:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:02,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:02,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512115295] [2021-07-13 19:24:02,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512115295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:02,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851618627] [2021-07-13 19:24:02,601 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:02,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:24:02,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:02,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851618627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:02,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:02,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:24:02,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043848140] [2021-07-13 19:24:02,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:02,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:02,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:02,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:02,676 INFO L87 Difference]: Start difference. First operand 76898 states and 234414 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:03,621 INFO L93 Difference]: Finished difference Result 78959 states and 240117 transitions. [2021-07-13 19:24:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:24:03,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:03,891 INFO L225 Difference]: With dead ends: 78959 [2021-07-13 19:24:03,891 INFO L226 Difference]: Without dead ends: 78959 [2021-07-13 19:24:03,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:24:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78959 states. [2021-07-13 19:24:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78959 to 77340. [2021-07-13 19:24:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77340 states, 77339 states have (on average 3.048138713973545) internal successors, (235740), 77339 states have internal predecessors, (235740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77340 states to 77340 states and 235740 transitions. [2021-07-13 19:24:05,957 INFO L78 Accepts]: Start accepts. Automaton has 77340 states and 235740 transitions. Word has length 22 [2021-07-13 19:24:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:05,957 INFO L482 AbstractCegarLoop]: Abstraction has 77340 states and 235740 transitions. [2021-07-13 19:24:05,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 77340 states and 235740 transitions. [2021-07-13 19:24:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:05,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:05,983 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:06,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9955,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:06,183 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:06,184 INFO L82 PathProgramCache]: Analyzing trace with hash -928937975, now seen corresponding path program 246 times [2021-07-13 19:24:06,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:06,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39789758] [2021-07-13 19:24:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:06,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:06,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39789758] [2021-07-13 19:24:06,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39789758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:06,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083949571] [2021-07-13 19:24:06,280 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:06,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:24:06,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:06,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:06,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:06,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083949571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:06,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:06,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-07-13 19:24:06,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551117292] [2021-07-13 19:24:06,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:06,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:06,348 INFO L87 Difference]: Start difference. First operand 77340 states and 235740 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:07,305 INFO L93 Difference]: Finished difference Result 77569 states and 236048 transitions. [2021-07-13 19:24:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:24:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:07,515 INFO L225 Difference]: With dead ends: 77569 [2021-07-13 19:24:07,515 INFO L226 Difference]: Without dead ends: 77563 [2021-07-13 19:24:07,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:24:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-07-13 19:24:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 77255. [2021-07-13 19:24:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77255 states, 77254 states have (on average 3.0479198488104178) internal successors, (235464), 77254 states have internal predecessors, (235464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77255 states to 77255 states and 235464 transitions. [2021-07-13 19:24:09,939 INFO L78 Accepts]: Start accepts. Automaton has 77255 states and 235464 transitions. Word has length 22 [2021-07-13 19:24:09,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:09,939 INFO L482 AbstractCegarLoop]: Abstraction has 77255 states and 235464 transitions. [2021-07-13 19:24:09,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 77255 states and 235464 transitions. [2021-07-13 19:24:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:09,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:09,974 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:10,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9956,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:10,189 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash -879550451, now seen corresponding path program 247 times [2021-07-13 19:24:10,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:10,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914878697] [2021-07-13 19:24:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:10,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:10,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914878697] [2021-07-13 19:24:10,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914878697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152716202] [2021-07-13 19:24:10,272 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:10,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:10,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:10,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152716202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:10,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 19:24:10,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368031583] [2021-07-13 19:24:10,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:10,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:10,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:10,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:10,353 INFO L87 Difference]: Start difference. First operand 77255 states and 235464 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:11,284 INFO L93 Difference]: Finished difference Result 105545 states and 320390 transitions. [2021-07-13 19:24:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:24:11,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:11,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:11,647 INFO L225 Difference]: With dead ends: 105545 [2021-07-13 19:24:11,647 INFO L226 Difference]: Without dead ends: 105545 [2021-07-13 19:24:11,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:24:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105545 states. [2021-07-13 19:24:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105545 to 103725. [2021-07-13 19:24:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103725 states, 103724 states have (on average 3.03849639427712) internal successors, (315165), 103724 states have internal predecessors, (315165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103725 states to 103725 states and 315165 transitions. [2021-07-13 19:24:14,626 INFO L78 Accepts]: Start accepts. Automaton has 103725 states and 315165 transitions. Word has length 22 [2021-07-13 19:24:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:14,627 INFO L482 AbstractCegarLoop]: Abstraction has 103725 states and 315165 transitions. [2021-07-13 19:24:14,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 103725 states and 315165 transitions. [2021-07-13 19:24:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:14,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:14,666 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:14,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9957,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:14,867 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash 603584487, now seen corresponding path program 248 times [2021-07-13 19:24:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:14,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386096998] [2021-07-13 19:24:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:15,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:15,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386096998] [2021-07-13 19:24:15,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386096998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:15,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262544440] [2021-07-13 19:24:15,315 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:15,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:15,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:15,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:15,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262544440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:15,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:15,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:24:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273675857] [2021-07-13 19:24:15,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:15,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:15,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:15,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:15,437 INFO L87 Difference]: Start difference. First operand 103725 states and 315165 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:16,195 INFO L93 Difference]: Finished difference Result 114469 states and 347083 transitions. [2021-07-13 19:24:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:24:16,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:16,848 INFO L225 Difference]: With dead ends: 114469 [2021-07-13 19:24:16,848 INFO L226 Difference]: Without dead ends: 114469 [2021-07-13 19:24:16,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 609.4ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:24:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114469 states. [2021-07-13 19:24:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114469 to 89851. [2021-07-13 19:24:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89851 states, 89850 states have (on average 3.041469115191987) internal successors, (273276), 89850 states have internal predecessors, (273276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89851 states to 89851 states and 273276 transitions. [2021-07-13 19:24:19,667 INFO L78 Accepts]: Start accepts. Automaton has 89851 states and 273276 transitions. Word has length 22 [2021-07-13 19:24:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:19,667 INFO L482 AbstractCegarLoop]: Abstraction has 89851 states and 273276 transitions. [2021-07-13 19:24:19,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand 89851 states and 273276 transitions. [2021-07-13 19:24:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:19,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:19,696 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:19,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9958 [2021-07-13 19:24:19,896 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash -663872691, now seen corresponding path program 249 times [2021-07-13 19:24:19,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:19,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915533703] [2021-07-13 19:24:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:19,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:19,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915533703] [2021-07-13 19:24:19,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915533703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:19,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528966522] [2021-07-13 19:24:19,982 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:20,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:24:20,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:20,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:20,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:20,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528966522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:20,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:20,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:24:20,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242292201] [2021-07-13 19:24:20,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:20,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:20,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:20,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:20,070 INFO L87 Difference]: Start difference. First operand 89851 states and 273276 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:21,233 INFO L93 Difference]: Finished difference Result 104983 states and 318293 transitions. [2021-07-13 19:24:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:24:21,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:21,596 INFO L225 Difference]: With dead ends: 104983 [2021-07-13 19:24:21,596 INFO L226 Difference]: Without dead ends: 104983 [2021-07-13 19:24:21,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:24:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104983 states. [2021-07-13 19:24:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104983 to 90067. [2021-07-13 19:24:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90067 states, 90066 states have (on average 3.0419581196011816) internal successors, (273977), 90066 states have internal predecessors, (273977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90067 states to 90067 states and 273977 transitions. [2021-07-13 19:24:24,507 INFO L78 Accepts]: Start accepts. Automaton has 90067 states and 273977 transitions. Word has length 22 [2021-07-13 19:24:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:24,508 INFO L482 AbstractCegarLoop]: Abstraction has 90067 states and 273977 transitions. [2021-07-13 19:24:24,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 90067 states and 273977 transitions. [2021-07-13 19:24:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:24,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:24,537 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:24,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9959,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:24,738 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:24,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1300339545, now seen corresponding path program 250 times [2021-07-13 19:24:24,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:24,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098954001] [2021-07-13 19:24:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:24,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:24,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098954001] [2021-07-13 19:24:24,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098954001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:24,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102279129] [2021-07-13 19:24:24,830 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:24,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:24,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:24,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102279129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:24,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:24,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:24:24,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128244753] [2021-07-13 19:24:24,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:24,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:24,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:24,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:24,914 INFO L87 Difference]: Start difference. First operand 90067 states and 273977 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:26,125 INFO L93 Difference]: Finished difference Result 104672 states and 317280 transitions. [2021-07-13 19:24:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:24:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:26,486 INFO L225 Difference]: With dead ends: 104672 [2021-07-13 19:24:26,487 INFO L226 Difference]: Without dead ends: 104672 [2021-07-13 19:24:26,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:24:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104672 states. [2021-07-13 19:24:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104672 to 90821. [2021-07-13 19:24:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90821 states, 90820 states have (on average 3.041995155252147) internal successors, (276274), 90820 states have internal predecessors, (276274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90821 states to 90821 states and 276274 transitions. [2021-07-13 19:24:29,157 INFO L78 Accepts]: Start accepts. Automaton has 90821 states and 276274 transitions. Word has length 22 [2021-07-13 19:24:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:29,157 INFO L482 AbstractCegarLoop]: Abstraction has 90821 states and 276274 transitions. [2021-07-13 19:24:29,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,157 INFO L276 IsEmpty]: Start isEmpty. Operand 90821 states and 276274 transitions. [2021-07-13 19:24:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:29,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:29,194 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:29,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9960 [2021-07-13 19:24:29,394 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 632691635, now seen corresponding path program 251 times [2021-07-13 19:24:29,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:29,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352677930] [2021-07-13 19:24:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:29,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:29,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352677930] [2021-07-13 19:24:29,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352677930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:29,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298113167] [2021-07-13 19:24:29,480 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:29,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:24:29,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:29,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:29,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298113167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:29,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:29,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:24:29,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695717753] [2021-07-13 19:24:29,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:29,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:29,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:29,565 INFO L87 Difference]: Start difference. First operand 90821 states and 276274 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:30,708 INFO L93 Difference]: Finished difference Result 105621 states and 320343 transitions. [2021-07-13 19:24:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:24:30,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:30,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:31,344 INFO L225 Difference]: With dead ends: 105621 [2021-07-13 19:24:31,344 INFO L226 Difference]: Without dead ends: 105621 [2021-07-13 19:24:31,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:24:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105621 states. [2021-07-13 19:24:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105621 to 87948. [2021-07-13 19:24:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87948 states, 87947 states have (on average 3.0435716965899915) internal successors, (267673), 87947 states have internal predecessors, (267673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87948 states to 87948 states and 267673 transitions. [2021-07-13 19:24:33,753 INFO L78 Accepts]: Start accepts. Automaton has 87948 states and 267673 transitions. Word has length 22 [2021-07-13 19:24:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:33,753 INFO L482 AbstractCegarLoop]: Abstraction has 87948 states and 267673 transitions. [2021-07-13 19:24:33,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 87948 states and 267673 transitions. [2021-07-13 19:24:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:34,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:34,138 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:34,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9961 [2021-07-13 19:24:34,338 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash -3775219, now seen corresponding path program 252 times [2021-07-13 19:24:34,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:34,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200808978] [2021-07-13 19:24:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:34,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200808978] [2021-07-13 19:24:34,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200808978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808450312] [2021-07-13 19:24:34,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:34,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:24:34,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:34,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:34,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:34,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808450312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:34,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:34,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:24:34,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654156695] [2021-07-13 19:24:34,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:34,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:34,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:34,515 INFO L87 Difference]: Start difference. First operand 87948 states and 267673 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:35,642 INFO L93 Difference]: Finished difference Result 96355 states and 292373 transitions. [2021-07-13 19:24:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:24:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:35,918 INFO L225 Difference]: With dead ends: 96355 [2021-07-13 19:24:35,918 INFO L226 Difference]: Without dead ends: 96355 [2021-07-13 19:24:35,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:24:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96355 states. [2021-07-13 19:24:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96355 to 89848. [2021-07-13 19:24:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89848 states, 89847 states have (on average 3.042728193484479) internal successors, (273380), 89847 states have internal predecessors, (273380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89848 states to 89848 states and 273380 transitions. [2021-07-13 19:24:38,483 INFO L78 Accepts]: Start accepts. Automaton has 89848 states and 273380 transitions. Word has length 22 [2021-07-13 19:24:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:38,483 INFO L482 AbstractCegarLoop]: Abstraction has 89848 states and 273380 transitions. [2021-07-13 19:24:38,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 89848 states and 273380 transitions. [2021-07-13 19:24:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:38,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:38,539 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:38,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9962,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:38,742 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1342276787, now seen corresponding path program 253 times [2021-07-13 19:24:38,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:38,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137855147] [2021-07-13 19:24:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:38,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:38,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137855147] [2021-07-13 19:24:38,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137855147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:38,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382855355] [2021-07-13 19:24:38,816 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:38,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:38,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382855355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:38,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:38,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 19:24:38,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331796220] [2021-07-13 19:24:38,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:38,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:38,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:38,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:38,897 INFO L87 Difference]: Start difference. First operand 89848 states and 273380 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:39,526 INFO L93 Difference]: Finished difference Result 91563 states and 278140 transitions. [2021-07-13 19:24:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:24:39,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:40,081 INFO L225 Difference]: With dead ends: 91563 [2021-07-13 19:24:40,081 INFO L226 Difference]: Without dead ends: 91563 [2021-07-13 19:24:40,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:24:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91563 states. [2021-07-13 19:24:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91563 to 85666. [2021-07-13 19:24:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85666 states, 85665 states have (on average 3.044347166287282) internal successors, (260794), 85665 states have internal predecessors, (260794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85666 states to 85666 states and 260794 transitions. [2021-07-13 19:24:42,326 INFO L78 Accepts]: Start accepts. Automaton has 85666 states and 260794 transitions. Word has length 22 [2021-07-13 19:24:42,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:42,326 INFO L482 AbstractCegarLoop]: Abstraction has 85666 states and 260794 transitions. [2021-07-13 19:24:42,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 85666 states and 260794 transitions. [2021-07-13 19:24:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:42,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:42,375 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:42,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9963 [2021-07-13 19:24:42,589 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:42,589 INFO L82 PathProgramCache]: Analyzing trace with hash 140858151, now seen corresponding path program 254 times [2021-07-13 19:24:42,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:42,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916219974] [2021-07-13 19:24:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:42,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:42,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916219974] [2021-07-13 19:24:42,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916219974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:42,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797885768] [2021-07-13 19:24:42,668 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:42,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:42,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:42,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797885768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:42,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:42,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 19:24:42,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385233026] [2021-07-13 19:24:42,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:42,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:42,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:42,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:42,753 INFO L87 Difference]: Start difference. First operand 85666 states and 260794 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:43,720 INFO L93 Difference]: Finished difference Result 90021 states and 273590 transitions. [2021-07-13 19:24:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:24:43,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:43,985 INFO L225 Difference]: With dead ends: 90021 [2021-07-13 19:24:43,986 INFO L226 Difference]: Without dead ends: 90021 [2021-07-13 19:24:43,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:24:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90021 states. [2021-07-13 19:24:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90021 to 89587. [2021-07-13 19:24:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89587 states, 89586 states have (on average 3.0424173419954013) internal successors, (272558), 89586 states have internal predecessors, (272558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89587 states to 89587 states and 272558 transitions. [2021-07-13 19:24:46,602 INFO L78 Accepts]: Start accepts. Automaton has 89587 states and 272558 transitions. Word has length 22 [2021-07-13 19:24:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:46,602 INFO L482 AbstractCegarLoop]: Abstraction has 89587 states and 272558 transitions. [2021-07-13 19:24:46,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 89587 states and 272558 transitions. [2021-07-13 19:24:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:46,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:46,632 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:46,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9964,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:46,832 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:46,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1126599027, now seen corresponding path program 255 times [2021-07-13 19:24:46,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:46,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656534412] [2021-07-13 19:24:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:46,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:46,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656534412] [2021-07-13 19:24:46,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656534412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:46,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941647008] [2021-07-13 19:24:46,918 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:46,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:24:46,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:46,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:46,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:47,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941647008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:47,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:47,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:24:47,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303708019] [2021-07-13 19:24:47,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:47,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:47,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:47,008 INFO L87 Difference]: Start difference. First operand 89587 states and 272558 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:47,980 INFO L93 Difference]: Finished difference Result 91085 states and 276674 transitions. [2021-07-13 19:24:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:24:47,980 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:48,246 INFO L225 Difference]: With dead ends: 91085 [2021-07-13 19:24:48,246 INFO L226 Difference]: Without dead ends: 91085 [2021-07-13 19:24:48,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:24:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91085 states. [2021-07-13 19:24:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91085 to 87184. [2021-07-13 19:24:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87184 states, 87183 states have (on average 3.043563538763291) internal successors, (265347), 87183 states have internal predecessors, (265347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87184 states to 87184 states and 265347 transitions. [2021-07-13 19:24:51,068 INFO L78 Accepts]: Start accepts. Automaton has 87184 states and 265347 transitions. Word has length 22 [2021-07-13 19:24:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:51,068 INFO L482 AbstractCegarLoop]: Abstraction has 87184 states and 265347 transitions. [2021-07-13 19:24:51,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 87184 states and 265347 transitions. [2021-07-13 19:24:51,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:51,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:51,113 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:51,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9965 [2021-07-13 19:24:51,329 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:51,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1763065881, now seen corresponding path program 256 times [2021-07-13 19:24:51,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:51,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617974503] [2021-07-13 19:24:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:51,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:51,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617974503] [2021-07-13 19:24:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617974503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:51,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459021925] [2021-07-13 19:24:51,445 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:51,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:51,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459021925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:51,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:51,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:24:51,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583851040] [2021-07-13 19:24:51,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:51,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:51,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:51,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:51,545 INFO L87 Difference]: Start difference. First operand 87184 states and 265347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:52,698 INFO L93 Difference]: Finished difference Result 89148 states and 270843 transitions. [2021-07-13 19:24:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:24:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:52,983 INFO L225 Difference]: With dead ends: 89148 [2021-07-13 19:24:52,983 INFO L226 Difference]: Without dead ends: 89148 [2021-07-13 19:24:52,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:24:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89148 states. [2021-07-13 19:24:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89148 to 87528. [2021-07-13 19:24:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87528 states, 87527 states have (on average 3.0433923246541066) internal successors, (266379), 87527 states have internal predecessors, (266379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87528 states to 87528 states and 266379 transitions. [2021-07-13 19:24:55,189 INFO L78 Accepts]: Start accepts. Automaton has 87528 states and 266379 transitions. Word has length 22 [2021-07-13 19:24:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:55,189 INFO L482 AbstractCegarLoop]: Abstraction has 87528 states and 266379 transitions. [2021-07-13 19:24:55,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 87528 states and 266379 transitions. [2021-07-13 19:24:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:55,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:55,225 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:55,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9966,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:55,429 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash -18701875, now seen corresponding path program 257 times [2021-07-13 19:24:55,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:55,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790806097] [2021-07-13 19:24:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:55,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:55,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790806097] [2021-07-13 19:24:55,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790806097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:55,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662531973] [2021-07-13 19:24:55,524 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:55,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:24:55,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:55,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:55,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:55,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662531973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:55,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:55,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:24:55,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51397496] [2021-07-13 19:24:55,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:55,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:55,610 INFO L87 Difference]: Start difference. First operand 87528 states and 266379 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:56,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:56,753 INFO L93 Difference]: Finished difference Result 89118 states and 270691 transitions. [2021-07-13 19:24:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:24:56,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:24:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:57,313 INFO L225 Difference]: With dead ends: 89118 [2021-07-13 19:24:57,313 INFO L226 Difference]: Without dead ends: 89118 [2021-07-13 19:24:57,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:24:57,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89118 states. [2021-07-13 19:24:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89118 to 87510. [2021-07-13 19:24:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87510 states, 87509 states have (on average 3.043401250157127) internal successors, (266325), 87509 states have internal predecessors, (266325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87510 states to 87510 states and 266325 transitions. [2021-07-13 19:24:59,600 INFO L78 Accepts]: Start accepts. Automaton has 87510 states and 266325 transitions. Word has length 22 [2021-07-13 19:24:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:59,600 INFO L482 AbstractCegarLoop]: Abstraction has 87510 states and 266325 transitions. [2021-07-13 19:24:59,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 87510 states and 266325 transitions. [2021-07-13 19:24:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:24:59,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:59,643 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:59,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9967,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:59,857 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:59,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1303353945, now seen corresponding path program 258 times [2021-07-13 19:24:59,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:59,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480146917] [2021-07-13 19:24:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:59,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:59,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480146917] [2021-07-13 19:24:59,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480146917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:59,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409857499] [2021-07-13 19:24:59,953 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:59,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:24:59,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:24:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:00,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409857499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:00,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:00,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-13 19:25:00,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674606641] [2021-07-13 19:25:00,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:25:00,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:00,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:25:00,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:00,023 INFO L87 Difference]: Start difference. First operand 87510 states and 266325 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:00,963 INFO L93 Difference]: Finished difference Result 87690 states and 266541 transitions. [2021-07-13 19:25:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:25:00,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:00,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:01,226 INFO L225 Difference]: With dead ends: 87690 [2021-07-13 19:25:01,227 INFO L226 Difference]: Without dead ends: 87686 [2021-07-13 19:25:01,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:25:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87686 states. [2021-07-13 19:25:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87686 to 87508. [2021-07-13 19:25:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87508 states, 87507 states have (on average 3.0434250974207777) internal successors, (266321), 87507 states have internal predecessors, (266321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87508 states to 87508 states and 266321 transitions. [2021-07-13 19:25:04,008 INFO L78 Accepts]: Start accepts. Automaton has 87508 states and 266321 transitions. Word has length 22 [2021-07-13 19:25:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:04,008 INFO L482 AbstractCegarLoop]: Abstraction has 87508 states and 266321 transitions. [2021-07-13 19:25:04,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 87508 states and 266321 transitions. [2021-07-13 19:25:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:04,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:04,038 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:04,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9968,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:04,239 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1535013223, now seen corresponding path program 259 times [2021-07-13 19:25:04,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:04,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784131984] [2021-07-13 19:25:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:04,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:04,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784131984] [2021-07-13 19:25:04,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784131984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:04,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112282556] [2021-07-13 19:25:04,333 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:04,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:04,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:04,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112282556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:04,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:04,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-07-13 19:25:04,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942449454] [2021-07-13 19:25:04,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:04,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:04,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:04,424 INFO L87 Difference]: Start difference. First operand 87508 states and 266321 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:05,571 INFO L93 Difference]: Finished difference Result 97092 states and 294572 transitions. [2021-07-13 19:25:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:25:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:05,881 INFO L225 Difference]: With dead ends: 97092 [2021-07-13 19:25:05,882 INFO L226 Difference]: Without dead ends: 97092 [2021-07-13 19:25:05,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:25:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97092 states. [2021-07-13 19:25:08,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97092 to 93336. [2021-07-13 19:25:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93336 states, 93335 states have (on average 3.0407457009696257) internal successors, (283808), 93335 states have internal predecessors, (283808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93336 states to 93336 states and 283808 transitions. [2021-07-13 19:25:08,794 INFO L78 Accepts]: Start accepts. Automaton has 93336 states and 283808 transitions. Word has length 22 [2021-07-13 19:25:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:08,794 INFO L482 AbstractCegarLoop]: Abstraction has 93336 states and 283808 transitions. [2021-07-13 19:25:08,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 93336 states and 283808 transitions. [2021-07-13 19:25:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:08,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:08,828 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:09,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9969 [2021-07-13 19:25:09,029 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash -224277439, now seen corresponding path program 260 times [2021-07-13 19:25:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:09,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982486517] [2021-07-13 19:25:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:09,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:09,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982486517] [2021-07-13 19:25:09,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982486517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:09,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376807231] [2021-07-13 19:25:09,122 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:09,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:09,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:09,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:09,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:09,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376807231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:09,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:09,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-07-13 19:25:09,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103368616] [2021-07-13 19:25:09,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:09,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:09,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:09,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:09,223 INFO L87 Difference]: Start difference. First operand 93336 states and 283808 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:10,404 INFO L93 Difference]: Finished difference Result 97575 states and 296111 transitions. [2021-07-13 19:25:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:25:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:10,711 INFO L225 Difference]: With dead ends: 97575 [2021-07-13 19:25:10,712 INFO L226 Difference]: Without dead ends: 97575 [2021-07-13 19:25:10,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:25:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-07-13 19:25:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96000. [2021-07-13 19:25:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96000 states, 95999 states have (on average 3.0396149959895418) internal successors, (291800), 95999 states have internal predecessors, (291800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96000 states to 96000 states and 291800 transitions. [2021-07-13 19:25:13,632 INFO L78 Accepts]: Start accepts. Automaton has 96000 states and 291800 transitions. Word has length 22 [2021-07-13 19:25:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:13,633 INFO L482 AbstractCegarLoop]: Abstraction has 96000 states and 291800 transitions. [2021-07-13 19:25:13,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 96000 states and 291800 transitions. [2021-07-13 19:25:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:13,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:13,677 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:13,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9970,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:13,877 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1520086567, now seen corresponding path program 261 times [2021-07-13 19:25:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:13,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723165190] [2021-07-13 19:25:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:13,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:13,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723165190] [2021-07-13 19:25:13,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723165190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:13,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345876405] [2021-07-13 19:25:13,975 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:14,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:25:14,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:14,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345876405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:14,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:14,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-07-13 19:25:14,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829653205] [2021-07-13 19:25:14,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:14,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:14,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:14,070 INFO L87 Difference]: Start difference. First operand 96000 states and 291800 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:15,229 INFO L93 Difference]: Finished difference Result 98465 states and 298743 transitions. [2021-07-13 19:25:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:25:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:15,587 INFO L225 Difference]: With dead ends: 98465 [2021-07-13 19:25:15,587 INFO L226 Difference]: Without dead ends: 98465 [2021-07-13 19:25:15,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 374.1ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:25:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98465 states. [2021-07-13 19:25:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98465 to 96553. [2021-07-13 19:25:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96553 states, 96552 states have (on average 3.0393881017482807) internal successors, (293459), 96552 states have internal predecessors, (293459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96553 states to 96553 states and 293459 transitions. [2021-07-13 19:25:18,499 INFO L78 Accepts]: Start accepts. Automaton has 96553 states and 293459 transitions. Word has length 22 [2021-07-13 19:25:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:18,499 INFO L482 AbstractCegarLoop]: Abstraction has 96553 states and 293459 transitions. [2021-07-13 19:25:18,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 96553 states and 293459 transitions. [2021-07-13 19:25:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:18,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:18,548 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:18,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9971 [2021-07-13 19:25:18,749 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -761242551, now seen corresponding path program 262 times [2021-07-13 19:25:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:18,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254062614] [2021-07-13 19:25:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:18,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254062614] [2021-07-13 19:25:18,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254062614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:18,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838622810] [2021-07-13 19:25:18,843 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:18,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:18,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:18,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:18,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838622810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:18,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:18,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-07-13 19:25:18,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363514847] [2021-07-13 19:25:18,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:25:18,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:18,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:25:18,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:18,909 INFO L87 Difference]: Start difference. First operand 96553 states and 293459 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:19,928 INFO L93 Difference]: Finished difference Result 96926 states and 294310 transitions. [2021-07-13 19:25:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:25:19,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:19,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:20,249 INFO L225 Difference]: With dead ends: 96926 [2021-07-13 19:25:20,250 INFO L226 Difference]: Without dead ends: 96924 [2021-07-13 19:25:20,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96924 states. [2021-07-13 19:25:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96924 to 96774. [2021-07-13 19:25:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96774 states, 96773 states have (on average 3.0395564878633503) internal successors, (294147), 96773 states have internal predecessors, (294147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96774 states to 96774 states and 294147 transitions. [2021-07-13 19:25:22,994 INFO L78 Accepts]: Start accepts. Automaton has 96774 states and 294147 transitions. Word has length 22 [2021-07-13 19:25:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:22,994 INFO L482 AbstractCegarLoop]: Abstraction has 96774 states and 294147 transitions. [2021-07-13 19:25:22,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 96774 states and 294147 transitions. [2021-07-13 19:25:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:23,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:23,033 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:23,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9972 [2021-07-13 19:25:23,234 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:23,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:23,234 INFO L82 PathProgramCache]: Analyzing trace with hash 956506509, now seen corresponding path program 263 times [2021-07-13 19:25:23,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:23,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322725700] [2021-07-13 19:25:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:23,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322725700] [2021-07-13 19:25:23,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322725700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713411508] [2021-07-13 19:25:23,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:23,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:25:23,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:23,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:23,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713411508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:23,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:23,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-07-13 19:25:23,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43074715] [2021-07-13 19:25:23,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:25:23,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:23,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:25:23,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:23,807 INFO L87 Difference]: Start difference. First operand 96774 states and 294147 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:24,437 INFO L93 Difference]: Finished difference Result 98650 states and 299438 transitions. [2021-07-13 19:25:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:25:24,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:25,033 INFO L225 Difference]: With dead ends: 98650 [2021-07-13 19:25:25,033 INFO L226 Difference]: Without dead ends: 98650 [2021-07-13 19:25:25,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:25:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98650 states. [2021-07-13 19:25:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98650 to 96776. [2021-07-13 19:25:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96776 states, 96775 states have (on average 3.0395556703694138) internal successors, (294153), 96775 states have internal predecessors, (294153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96776 states to 96776 states and 294153 transitions. [2021-07-13 19:25:27,842 INFO L78 Accepts]: Start accepts. Automaton has 96776 states and 294153 transitions. Word has length 22 [2021-07-13 19:25:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:27,842 INFO L482 AbstractCegarLoop]: Abstraction has 96776 states and 294153 transitions. [2021-07-13 19:25:27,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 96776 states and 294153 transitions. [2021-07-13 19:25:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:27,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:27,916 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:28,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9973 [2021-07-13 19:25:28,141 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:28,141 INFO L82 PathProgramCache]: Analyzing trace with hash -772540825, now seen corresponding path program 264 times [2021-07-13 19:25:28,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:28,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969221042] [2021-07-13 19:25:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:28,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:28,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969221042] [2021-07-13 19:25:28,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969221042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:28,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301803235] [2021-07-13 19:25:28,233 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:28,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:25:28,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:28,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:28,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:28,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301803235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:28,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:28,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-07-13 19:25:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676780169] [2021-07-13 19:25:28,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:25:28,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:25:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:25:28,320 INFO L87 Difference]: Start difference. First operand 96776 states and 294153 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:29,292 INFO L93 Difference]: Finished difference Result 100367 states and 304534 transitions. [2021-07-13 19:25:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:25:29,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:29,608 INFO L225 Difference]: With dead ends: 100367 [2021-07-13 19:25:29,609 INFO L226 Difference]: Without dead ends: 100367 [2021-07-13 19:25:29,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:25:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100367 states. [2021-07-13 19:25:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100367 to 96786. [2021-07-13 19:25:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96786 states, 96785 states have (on average 3.0395515834065194) internal successors, (294183), 96785 states have internal predecessors, (294183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96786 states to 96786 states and 294183 transitions. [2021-07-13 19:25:32,416 INFO L78 Accepts]: Start accepts. Automaton has 96786 states and 294183 transitions. Word has length 22 [2021-07-13 19:25:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:32,416 INFO L482 AbstractCegarLoop]: Abstraction has 96786 states and 294183 transitions. [2021-07-13 19:25:32,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 96786 states and 294183 transitions. [2021-07-13 19:25:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:32,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:32,455 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:32,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9974 [2021-07-13 19:25:32,656 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1461566669, now seen corresponding path program 265 times [2021-07-13 19:25:32,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:32,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674467029] [2021-07-13 19:25:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:32,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674467029] [2021-07-13 19:25:32,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674467029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131372159] [2021-07-13 19:25:32,755 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:32,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:32,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131372159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:32,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-07-13 19:25:32,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094752362] [2021-07-13 19:25:32,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:25:32,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:25:32,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:25:32,843 INFO L87 Difference]: Start difference. First operand 96786 states and 294183 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:33,969 INFO L93 Difference]: Finished difference Result 103852 states and 314875 transitions. [2021-07-13 19:25:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:25:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:34,434 INFO L225 Difference]: With dead ends: 103852 [2021-07-13 19:25:34,434 INFO L226 Difference]: Without dead ends: 103852 [2021-07-13 19:25:34,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:25:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103852 states. [2021-07-13 19:25:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103852 to 100467. [2021-07-13 19:25:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100467 states, 100466 states have (on average 3.0390181753030876) internal successors, (305318), 100466 states have internal predecessors, (305318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100467 states to 100467 states and 305318 transitions. [2021-07-13 19:25:37,578 INFO L78 Accepts]: Start accepts. Automaton has 100467 states and 305318 transitions. Word has length 22 [2021-07-13 19:25:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:37,578 INFO L482 AbstractCegarLoop]: Abstraction has 100467 states and 305318 transitions. [2021-07-13 19:25:37,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 100467 states and 305318 transitions. [2021-07-13 19:25:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:37,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:37,620 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:37,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9975 [2021-07-13 19:25:37,820 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1999422247, now seen corresponding path program 266 times [2021-07-13 19:25:37,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:37,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348673606] [2021-07-13 19:25:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:37,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348673606] [2021-07-13 19:25:37,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348673606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:37,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460540679] [2021-07-13 19:25:37,935 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:37,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:37,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:38,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460540679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:38,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:38,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-07-13 19:25:38,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485907356] [2021-07-13 19:25:38,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:25:38,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:25:38,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:25:38,025 INFO L87 Difference]: Start difference. First operand 100467 states and 305318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:39,244 INFO L93 Difference]: Finished difference Result 117624 states and 356391 transitions. [2021-07-13 19:25:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:25:39,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:39,970 INFO L225 Difference]: With dead ends: 117624 [2021-07-13 19:25:39,970 INFO L226 Difference]: Without dead ends: 117624 [2021-07-13 19:25:39,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 674.1ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:25:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117624 states. [2021-07-13 19:25:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117624 to 114603. [2021-07-13 19:25:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114603 states, 114602 states have (on average 3.0346416292909373) internal successors, (347776), 114602 states have internal predecessors, (347776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114603 states to 114603 states and 347776 transitions. [2021-07-13 19:25:43,232 INFO L78 Accepts]: Start accepts. Automaton has 114603 states and 347776 transitions. Word has length 22 [2021-07-13 19:25:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:43,232 INFO L482 AbstractCegarLoop]: Abstraction has 114603 states and 347776 transitions. [2021-07-13 19:25:43,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 114603 states and 347776 transitions. [2021-07-13 19:25:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:43,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:43,277 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:43,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9976,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:43,478 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1493075981, now seen corresponding path program 267 times [2021-07-13 19:25:43,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:43,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636275722] [2021-07-13 19:25:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:43,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:43,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636275722] [2021-07-13 19:25:43,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636275722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:43,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207022691] [2021-07-13 19:25:43,573 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:44,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:25:44,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:44,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:44,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:44,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207022691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:44,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:44,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-07-13 19:25:44,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111396659] [2021-07-13 19:25:44,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:44,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:44,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:44,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:44,107 INFO L87 Difference]: Start difference. First operand 114603 states and 347776 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:45,249 INFO L93 Difference]: Finished difference Result 117101 states and 354865 transitions. [2021-07-13 19:25:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:25:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:45,625 INFO L225 Difference]: With dead ends: 117101 [2021-07-13 19:25:45,625 INFO L226 Difference]: Without dead ends: 117101 [2021-07-13 19:25:45,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 353.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:25:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117101 states. [2021-07-13 19:25:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117101 to 114723. [2021-07-13 19:25:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114723 states, 114722 states have (on average 3.034596677184847) internal successors, (348135), 114722 states have internal predecessors, (348135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114723 states to 114723 states and 348135 transitions. [2021-07-13 19:25:49,241 INFO L78 Accepts]: Start accepts. Automaton has 114723 states and 348135 transitions. Word has length 22 [2021-07-13 19:25:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:49,241 INFO L482 AbstractCegarLoop]: Abstraction has 114723 states and 348135 transitions. [2021-07-13 19:25:49,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 114723 states and 348135 transitions. [2021-07-13 19:25:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:49,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:49,324 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:49,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9977,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:49,537 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1318756377, now seen corresponding path program 268 times [2021-07-13 19:25:49,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:49,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275694432] [2021-07-13 19:25:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:49,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275694432] [2021-07-13 19:25:49,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275694432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:49,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950339612] [2021-07-13 19:25:49,631 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:49,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:49,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:49,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:49,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950339612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:49,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:49,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-07-13 19:25:49,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343814438] [2021-07-13 19:25:49,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:49,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:49,726 INFO L87 Difference]: Start difference. First operand 114723 states and 348135 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:50,860 INFO L93 Difference]: Finished difference Result 129613 states and 392477 transitions. [2021-07-13 19:25:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:25:50,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:51,315 INFO L225 Difference]: With dead ends: 129613 [2021-07-13 19:25:51,315 INFO L226 Difference]: Without dead ends: 129613 [2021-07-13 19:25:51,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:25:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129613 states. [2021-07-13 19:25:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129613 to 128238. [2021-07-13 19:25:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128238 states, 128237 states have (on average 3.0310128901954974) internal successors, (388688), 128237 states have internal predecessors, (388688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128238 states to 128238 states and 388688 transitions. [2021-07-13 19:25:55,332 INFO L78 Accepts]: Start accepts. Automaton has 128238 states and 388688 transitions. Word has length 22 [2021-07-13 19:25:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:55,332 INFO L482 AbstractCegarLoop]: Abstraction has 128238 states and 388688 transitions. [2021-07-13 19:25:55,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 128238 states and 388688 transitions. [2021-07-13 19:25:55,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:25:55,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:55,381 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:55,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9978,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:55,582 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1708753741, now seen corresponding path program 269 times [2021-07-13 19:25:55,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:55,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236298137] [2021-07-13 19:25:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:56,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:56,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236298137] [2021-07-13 19:25:56,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236298137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:56,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776729422] [2021-07-13 19:25:56,131 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:56,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:25:56,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:56,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776729422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:56,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:56,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-07-13 19:25:56,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469825193] [2021-07-13 19:25:56,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:56,242 INFO L87 Difference]: Start difference. First operand 128238 states and 388688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:57,378 INFO L93 Difference]: Finished difference Result 131498 states and 398224 transitions. [2021-07-13 19:25:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:25:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:25:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:57,814 INFO L225 Difference]: With dead ends: 131498 [2021-07-13 19:25:57,814 INFO L226 Difference]: Without dead ends: 131498 [2021-07-13 19:25:57,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 724.6ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:25:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131498 states. [2021-07-13 19:26:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131498 to 130639. [2021-07-13 19:26:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130639 states, 130638 states have (on average 3.0304429032900075) internal successors, (395891), 130638 states have internal predecessors, (395891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130639 states to 130639 states and 395891 transitions. [2021-07-13 19:26:01,566 INFO L78 Accepts]: Start accepts. Automaton has 130639 states and 395891 transitions. Word has length 22 [2021-07-13 19:26:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:01,566 INFO L482 AbstractCegarLoop]: Abstraction has 130639 states and 395891 transitions. [2021-07-13 19:26:01,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 130639 states and 395891 transitions. [2021-07-13 19:26:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:01,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:01,609 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:01,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9979,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:01,813 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1072286887, now seen corresponding path program 270 times [2021-07-13 19:26:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:01,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028012321] [2021-07-13 19:26:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:01,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028012321] [2021-07-13 19:26:01,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028012321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:01,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266663740] [2021-07-13 19:26:01,930 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:01,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:26:01,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:01,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:26:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:02,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266663740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:02,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-07-13 19:26:02,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34843204] [2021-07-13 19:26:02,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:26:02,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:26:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:02,034 INFO L87 Difference]: Start difference. First operand 130639 states and 395891 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,554 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 19:26:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:03,331 INFO L93 Difference]: Finished difference Result 132410 states and 400904 transitions. [2021-07-13 19:26:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:26:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:26:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:04,052 INFO L225 Difference]: With dead ends: 132410 [2021-07-13 19:26:04,052 INFO L226 Difference]: Without dead ends: 132410 [2021-07-13 19:26:04,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:26:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132410 states. [2021-07-13 19:26:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132410 to 130698. [2021-07-13 19:26:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130698 states, 130697 states have (on average 3.030429160577519) internal successors, (396068), 130697 states have internal predecessors, (396068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130698 states to 130698 states and 396068 transitions. [2021-07-13 19:26:07,756 INFO L78 Accepts]: Start accepts. Automaton has 130698 states and 396068 transitions. Word has length 22 [2021-07-13 19:26:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:07,756 INFO L482 AbstractCegarLoop]: Abstraction has 130698 states and 396068 transitions. [2021-07-13 19:26:07,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 130698 states and 396068 transitions. [2021-07-13 19:26:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:07,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:07,799 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:07,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9980,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:07,999 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:07,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:07,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1478316403, now seen corresponding path program 271 times [2021-07-13 19:26:08,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:08,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176855471] [2021-07-13 19:26:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:08,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:08,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176855471] [2021-07-13 19:26:08,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176855471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:08,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590530138] [2021-07-13 19:26:08,108 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:08,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:26:08,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:08,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590530138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:08,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:08,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-07-13 19:26:08,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414404859] [2021-07-13 19:26:08,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:26:08,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:26:08,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:08,236 INFO L87 Difference]: Start difference. First operand 130698 states and 396068 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:08,906 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 19:26:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:09,556 INFO L93 Difference]: Finished difference Result 132757 states and 401917 transitions. [2021-07-13 19:26:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:26:09,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:26:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:10,274 INFO L225 Difference]: With dead ends: 132757 [2021-07-13 19:26:10,274 INFO L226 Difference]: Without dead ends: 132757 [2021-07-13 19:26:10,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 754.2ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:26:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132757 states. [2021-07-13 19:26:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132757 to 131013. [2021-07-13 19:26:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131013 states, 131012 states have (on average 3.0303559979238543) internal successors, (397013), 131012 states have internal predecessors, (397013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131013 states to 131013 states and 397013 transitions. [2021-07-13 19:26:14,063 INFO L78 Accepts]: Start accepts. Automaton has 131013 states and 397013 transitions. Word has length 22 [2021-07-13 19:26:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:14,063 INFO L482 AbstractCegarLoop]: Abstraction has 131013 states and 397013 transitions. [2021-07-13 19:26:14,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 131013 states and 397013 transitions. [2021-07-13 19:26:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:26:14,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:14,108 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:14,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9981 [2021-07-13 19:26:14,308 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1057360231, now seen corresponding path program 272 times [2021-07-13 19:26:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:14,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810209052] [2021-07-13 19:26:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:14,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:14,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810209052] [2021-07-13 19:26:14,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810209052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:14,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814868193] [2021-07-13 19:26:14,413 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:14,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:14,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:14,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:26:14,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:14,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814868193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:14,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:14,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-07-13 19:26:14,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872899669] [2021-07-13 19:26:14,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:14,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:14,533 INFO L87 Difference]: Start difference. First operand 131013 states and 397013 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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) [2021-07-13 19:26:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:16,141 INFO L93 Difference]: Finished difference Result 135540 states and 410128 transitions. [2021-07-13 19:26:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:26:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 22 [2021-07-13 19:26:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:16,770 INFO L225 Difference]: With dead ends: 135540 [2021-07-13 19:26:16,771 INFO L226 Difference]: Without dead ends: 135540 [2021-07-13 19:26:16,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 805.8ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:26:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135540 states. [2021-07-13 19:26:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135540 to 131079. [2021-07-13 19:26:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0303407131631546) internal successors, (397211), 131078 states have internal predecessors, (397211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 397211 transitions. [2021-07-13 19:26:20,990 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 397211 transitions. Word has length 22 [2021-07-13 19:26:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:20,990 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 397211 transitions. [2021-07-13 19:26:20,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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) [2021-07-13 19:26:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 397211 transitions. [2021-07-13 19:26:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:21,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:21,046 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:21,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9982,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:21,246 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1384664402, now seen corresponding path program 273 times [2021-07-13 19:26:21,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:21,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724174397] [2021-07-13 19:26:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:21,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:21,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724174397] [2021-07-13 19:26:21,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724174397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:21,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014961476] [2021-07-13 19:26:21,361 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:21,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:26:21,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:26:21,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:21,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014961476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:21,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:21,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-07-13 19:26:21,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069410106] [2021-07-13 19:26:21,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:26:21,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:21,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:26:21,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:26:21,445 INFO L87 Difference]: Start difference. First operand 131079 states and 397211 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:22,638 INFO L93 Difference]: Finished difference Result 131316 states and 397574 transitions. [2021-07-13 19:26:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:26:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:23,130 INFO L225 Difference]: With dead ends: 131316 [2021-07-13 19:26:23,130 INFO L226 Difference]: Without dead ends: 131310 [2021-07-13 19:26:23,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:26:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131310 states. [2021-07-13 19:26:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131310 to 131104. [2021-07-13 19:26:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0301594929177824) internal successors, (397263), 131103 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397263 transitions. [2021-07-13 19:26:27,522 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397263 transitions. Word has length 24 [2021-07-13 19:26:27,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:27,522 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397263 transitions. [2021-07-13 19:26:27,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397263 transitions. [2021-07-13 19:26:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:27,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:27,582 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:27,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9983 [2021-07-13 19:26:27,782 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1036551628, now seen corresponding path program 274 times [2021-07-13 19:26:27,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:27,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833653089] [2021-07-13 19:26:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:27,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833653089] [2021-07-13 19:26:27,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833653089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840139426] [2021-07-13 19:26:27,881 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:27,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:27,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:27,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:26:27,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:28,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840139426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:28,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:28,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 19 [2021-07-13 19:26:28,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225912694] [2021-07-13 19:26:28,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:26:28,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:28,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:26:28,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:28,012 INFO L87 Difference]: Start difference. First operand 131104 states and 397263 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:29,282 INFO L93 Difference]: Finished difference Result 131229 states and 397402 transitions. [2021-07-13 19:26:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:26:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-07-13 19:26:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:29,869 INFO L225 Difference]: With dead ends: 131229 [2021-07-13 19:26:29,869 INFO L226 Difference]: Without dead ends: 131229 [2021-07-13 19:26:29,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:26:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131229 states. [2021-07-13 19:26:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131229 to 131082. [2021-07-13 19:26:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0302637300600392) internal successors, (397210), 131081 states have internal predecessors, (397210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 397210 transitions. [2021-07-13 19:26:34,477 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 397210 transitions. Word has length 24 [2021-07-13 19:26:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:34,477 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 397210 transitions. [2021-07-13 19:26:34,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 397210 transitions. [2021-07-13 19:26:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:34,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:34,534 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:34,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9984 [2021-07-13 19:26:34,734 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash -757952152, now seen corresponding path program 275 times [2021-07-13 19:26:34,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:34,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605001236] [2021-07-13 19:26:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:34,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:34,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605001236] [2021-07-13 19:26:34,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605001236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362281096] [2021-07-13 19:26:34,820 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:34,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:26:34,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:34,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:26:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:26:34,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362281096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:34,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2021-07-13 19:26:34,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494624715] [2021-07-13 19:26:34,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:26:34,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:26:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:34,931 INFO L87 Difference]: Start difference. First operand 131082 states and 397210 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:36,112 INFO L93 Difference]: Finished difference Result 131237 states and 397440 transitions. [2021-07-13 19:26:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-07-13 19:26:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:36,598 INFO L225 Difference]: With dead ends: 131237 [2021-07-13 19:26:36,598 INFO L226 Difference]: Without dead ends: 131237 [2021-07-13 19:26:36,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:26:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-07-13 19:26:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131093. [2021-07-13 19:26:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.0302077930003355) internal successors, (397236), 131092 states have internal predecessors, (397236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397236 transitions. [2021-07-13 19:26:40,657 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397236 transitions. Word has length 24 [2021-07-13 19:26:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:40,657 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397236 transitions. [2021-07-13 19:26:40,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397236 transitions. [2021-07-13 19:26:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:41,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:41,267 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:41,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9985 [2021-07-13 19:26:41,481 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:41,481 INFO L82 PathProgramCache]: Analyzing trace with hash -711302988, now seen corresponding path program 276 times [2021-07-13 19:26:41,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:41,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286152418] [2021-07-13 19:26:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:41,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:41,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286152418] [2021-07-13 19:26:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286152418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:41,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096775645] [2021-07-13 19:26:41,569 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:41,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:26:41,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:26:41,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:41,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096775645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:41,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:41,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:26:41,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673223707] [2021-07-13 19:26:41,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:26:41,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:41,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:26:41,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:41,655 INFO L87 Difference]: Start difference. First operand 131093 states and 397236 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:42,780 INFO L93 Difference]: Finished difference Result 131154 states and 397359 transitions. [2021-07-13 19:26:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:26:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:26:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:43,269 INFO L225 Difference]: With dead ends: 131154 [2021-07-13 19:26:43,270 INFO L226 Difference]: Without dead ends: 131153 [2021-07-13 19:26:43,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:26:43,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131153 states. [2021-07-13 19:26:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131153 to 131093. [2021-07-13 19:26:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.030184908308669) internal successors, (397233), 131092 states have internal predecessors, (397233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397233 transitions. [2021-07-13 19:26:47,574 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397233 transitions. Word has length 24 [2021-07-13 19:26:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:47,574 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397233 transitions. [2021-07-13 19:26:47,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397233 transitions. [2021-07-13 19:26:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:47,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:47,636 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:47,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9986 [2021-07-13 19:26:47,837 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1157400778, now seen corresponding path program 277 times [2021-07-13 19:26:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:47,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629951410] [2021-07-13 19:26:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:47,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:47,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629951410] [2021-07-13 19:26:47,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629951410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338733799] [2021-07-13 19:26:47,911 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:26:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:26:47,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338733799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:47,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:26:47,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392473871] [2021-07-13 19:26:47,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:47,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:47,987 INFO L87 Difference]: Start difference. First operand 131093 states and 397233 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:49,164 INFO L93 Difference]: Finished difference Result 131454 states and 397901 transitions. [2021-07-13 19:26:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:26:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:49,962 INFO L225 Difference]: With dead ends: 131454 [2021-07-13 19:26:49,962 INFO L226 Difference]: Without dead ends: 131452 [2021-07-13 19:26:49,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-07-13 19:26:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131181. [2021-07-13 19:26:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131181 states, 131180 states have (on average 3.0299893276414087) internal successors, (397474), 131180 states have internal predecessors, (397474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131181 states to 131181 states and 397474 transitions. [2021-07-13 19:26:53,995 INFO L78 Accepts]: Start accepts. Automaton has 131181 states and 397474 transitions. Word has length 24 [2021-07-13 19:26:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:53,995 INFO L482 AbstractCegarLoop]: Abstraction has 131181 states and 397474 transitions. [2021-07-13 19:26:53,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 131181 states and 397474 transitions. [2021-07-13 19:26:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:54,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:54,059 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:54,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9987,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:54,259 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1392111828, now seen corresponding path program 278 times [2021-07-13 19:26:54,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:54,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489428405] [2021-07-13 19:26:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:54,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:54,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489428405] [2021-07-13 19:26:54,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489428405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841624981] [2021-07-13 19:26:54,326 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:54,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:54,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:54,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:26:54,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:26:54,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841624981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:54,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:26:54,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602008178] [2021-07-13 19:26:54,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:26:54,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:26:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:54,404 INFO L87 Difference]: Start difference. First operand 131181 states and 397474 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:55,595 INFO L93 Difference]: Finished difference Result 131473 states and 397928 transitions. [2021-07-13 19:26:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:55,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:26:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:56,106 INFO L225 Difference]: With dead ends: 131473 [2021-07-13 19:26:56,106 INFO L226 Difference]: Without dead ends: 131464 [2021-07-13 19:26:56,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:26:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131464 states. [2021-07-13 19:27:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131464 to 131129. [2021-07-13 19:27:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131129 states, 131128 states have (on average 3.030046976999573) internal successors, (397324), 131128 states have internal predecessors, (397324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131129 states to 131129 states and 397324 transitions. [2021-07-13 19:27:01,256 INFO L78 Accepts]: Start accepts. Automaton has 131129 states and 397324 transitions. Word has length 24 [2021-07-13 19:27:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:01,257 INFO L482 AbstractCegarLoop]: Abstraction has 131129 states and 397324 transitions. [2021-07-13 19:27:01,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 131129 states and 397324 transitions. [2021-07-13 19:27:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:01,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:01,319 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:01,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9988,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:01,520 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash 318501480, now seen corresponding path program 279 times [2021-07-13 19:27:01,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:01,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099343227] [2021-07-13 19:27:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:01,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099343227] [2021-07-13 19:27:01,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099343227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418945328] [2021-07-13 19:27:01,596 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:01,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:27:01,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:27:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:01,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418945328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:01,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:27:01,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932189062] [2021-07-13 19:27:01,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:27:01,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:27:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:01,665 INFO L87 Difference]: Start difference. First operand 131129 states and 397324 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:02,800 INFO L93 Difference]: Finished difference Result 131345 states and 397633 transitions. [2021-07-13 19:27:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:27:02,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 24 [2021-07-13 19:27:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:03,314 INFO L225 Difference]: With dead ends: 131345 [2021-07-13 19:27:03,314 INFO L226 Difference]: Without dead ends: 131343 [2021-07-13 19:27:03,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:27:03,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131343 states. [2021-07-13 19:27:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131343 to 131121. [2021-07-13 19:27:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131121 states, 131120 states have (on average 3.0300030506406346) internal successors, (397294), 131120 states have internal predecessors, (397294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131121 states to 131121 states and 397294 transitions. [2021-07-13 19:27:08,076 INFO L78 Accepts]: Start accepts. Automaton has 131121 states and 397294 transitions. Word has length 24 [2021-07-13 19:27:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:08,076 INFO L482 AbstractCegarLoop]: Abstraction has 131121 states and 397294 transitions. [2021-07-13 19:27:08,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 131121 states and 397294 transitions. [2021-07-13 19:27:08,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:08,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:08,156 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:08,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9989,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:08,381 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:08,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1807906476, now seen corresponding path program 280 times [2021-07-13 19:27:08,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:08,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17040255] [2021-07-13 19:27:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:08,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:08,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17040255] [2021-07-13 19:27:08,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17040255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:08,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218167765] [2021-07-13 19:27:08,465 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:08,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:08,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:27:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:27:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218167765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:08,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:08,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-07-13 19:27:08,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906301180] [2021-07-13 19:27:08,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:27:08,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:08,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:27:08,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:08,536 INFO L87 Difference]: Start difference. First operand 131121 states and 397294 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:09,743 INFO L93 Difference]: Finished difference Result 131339 states and 397604 transitions. [2021-07-13 19:27:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:27:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:27:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:10,231 INFO L225 Difference]: With dead ends: 131339 [2021-07-13 19:27:10,231 INFO L226 Difference]: Without dead ends: 131336 [2021-07-13 19:27:10,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:27:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131336 states. [2021-07-13 19:27:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131336 to 131113. [2021-07-13 19:27:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.0299667459881627) internal successors, (397265), 131112 states have internal predecessors, (397265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397265 transitions. [2021-07-13 19:27:14,535 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397265 transitions. Word has length 24 [2021-07-13 19:27:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:14,535 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397265 transitions. [2021-07-13 19:27:14,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397265 transitions. [2021-07-13 19:27:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:14,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:14,611 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:14,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9990 [2021-07-13 19:27:14,811 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:14,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash 734821096, now seen corresponding path program 281 times [2021-07-13 19:27:14,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:14,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283792860] [2021-07-13 19:27:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:15,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:15,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283792860] [2021-07-13 19:27:15,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283792860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:15,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466528832] [2021-07-13 19:27:15,412 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:15,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:27:15,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:27:15,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:27:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466528832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:15,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:15,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-13 19:27:15,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960463986] [2021-07-13 19:27:15,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:27:15,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:27:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:15,486 INFO L87 Difference]: Start difference. First operand 131113 states and 397265 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:16,655 INFO L93 Difference]: Finished difference Result 131264 states and 397507 transitions. [2021-07-13 19:27:16,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:27:16,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:27:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:17,128 INFO L225 Difference]: With dead ends: 131264 [2021-07-13 19:27:17,128 INFO L226 Difference]: Without dead ends: 131259 [2021-07-13 19:27:17,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:27:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131259 states. [2021-07-13 19:27:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131259 to 131113. [2021-07-13 19:27:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.029920983586552) internal successors, (397259), 131112 states have internal predecessors, (397259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397259 transitions. [2021-07-13 19:27:21,399 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397259 transitions. Word has length 24 [2021-07-13 19:27:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:21,399 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397259 transitions. [2021-07-13 19:27:21,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397259 transitions. [2021-07-13 19:27:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:21,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:21,462 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:21,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9991 [2021-07-13 19:27:21,663 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1943482834, now seen corresponding path program 282 times [2021-07-13 19:27:21,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:21,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595562815] [2021-07-13 19:27:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:27:21,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:21,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595562815] [2021-07-13 19:27:21,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595562815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:21,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974396397] [2021-07-13 19:27:21,731 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:21,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:27:21,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:27:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:27:21,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974396397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:21,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:21,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:27:21,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771931664] [2021-07-13 19:27:21,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:27:21,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:21,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:27:21,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:27:21,811 INFO L87 Difference]: Start difference. First operand 131113 states and 397259 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:23,000 INFO L93 Difference]: Finished difference Result 131472 states and 397913 transitions. [2021-07-13 19:27:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:27:23,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:27:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:23,796 INFO L225 Difference]: With dead ends: 131472 [2021-07-13 19:27:23,796 INFO L226 Difference]: Without dead ends: 131470 [2021-07-13 19:27:23,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:27:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-07-13 19:27:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131189. [2021-07-13 19:27:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.0296902155684973) internal successors, (397459), 131188 states have internal predecessors, (397459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 397459 transitions. [2021-07-13 19:27:28,006 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 397459 transitions. Word has length 24 [2021-07-13 19:27:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:28,006 INFO L482 AbstractCegarLoop]: Abstraction has 131189 states and 397459 transitions. [2021-07-13 19:27:28,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 397459 transitions. [2021-07-13 19:27:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:28,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:28,069 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:28,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9992,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:28,269 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash -606029772, now seen corresponding path program 283 times [2021-07-13 19:27:28,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:28,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805455644] [2021-07-13 19:27:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:28,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805455644] [2021-07-13 19:27:28,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805455644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448651941] [2021-07-13 19:27:28,355 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:27:28,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:27:28,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448651941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:28,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:28,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:27:28,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321991611] [2021-07-13 19:27:28,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:27:28,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:28,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:27:28,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:28,441 INFO L87 Difference]: Start difference. First operand 131189 states and 397459 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:29,619 INFO L93 Difference]: Finished difference Result 131509 states and 397970 transitions. [2021-07-13 19:27:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:27:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:27:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:30,088 INFO L225 Difference]: With dead ends: 131509 [2021-07-13 19:27:30,089 INFO L226 Difference]: Without dead ends: 131502 [2021-07-13 19:27:30,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:27:30,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131502 states. [2021-07-13 19:27:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131502 to 131146. [2021-07-13 19:27:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131146 states, 131145 states have (on average 3.029646574402379) internal successors, (397323), 131145 states have internal predecessors, (397323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131146 states to 131146 states and 397323 transitions. [2021-07-13 19:27:34,804 INFO L78 Accepts]: Start accepts. Automaton has 131146 states and 397323 transitions. Word has length 24 [2021-07-13 19:27:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:34,804 INFO L482 AbstractCegarLoop]: Abstraction has 131146 states and 397323 transitions. [2021-07-13 19:27:34,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 131146 states and 397323 transitions. [2021-07-13 19:27:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:34,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:34,864 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:35,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9993 [2021-07-13 19:27:35,064 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1104583536, now seen corresponding path program 284 times [2021-07-13 19:27:35,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:35,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746896606] [2021-07-13 19:27:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:35,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:35,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746896606] [2021-07-13 19:27:35,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746896606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:35,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121914745] [2021-07-13 19:27:35,135 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:35,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:35,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:27:35,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:27:35,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121914745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:35,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:35,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-07-13 19:27:35,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762174328] [2021-07-13 19:27:35,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:27:35,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:35,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:27:35,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:35,240 INFO L87 Difference]: Start difference. First operand 131146 states and 397323 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:36,447 INFO L93 Difference]: Finished difference Result 131510 states and 397931 transitions. [2021-07-13 19:27:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:27:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:36,953 INFO L225 Difference]: With dead ends: 131510 [2021-07-13 19:27:36,953 INFO L226 Difference]: Without dead ends: 131508 [2021-07-13 19:27:36,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:27:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131508 states. [2021-07-13 19:27:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131508 to 131130. [2021-07-13 19:27:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131130 states, 131129 states have (on average 3.029581557092634) internal successors, (397266), 131129 states have internal predecessors, (397266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131130 states to 131130 states and 397266 transitions. [2021-07-13 19:27:42,241 INFO L78 Accepts]: Start accepts. Automaton has 131130 states and 397266 transitions. Word has length 24 [2021-07-13 19:27:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:42,241 INFO L482 AbstractCegarLoop]: Abstraction has 131130 states and 397266 transitions. [2021-07-13 19:27:42,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 131130 states and 397266 transitions. [2021-07-13 19:27:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:42,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:42,313 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:42,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9994 [2021-07-13 19:27:42,513 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:42,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:42,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1700978764, now seen corresponding path program 285 times [2021-07-13 19:27:42,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:42,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022476375] [2021-07-13 19:27:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:42,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:42,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022476375] [2021-07-13 19:27:42,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022476375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:42,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380516767] [2021-07-13 19:27:42,592 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:42,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:27:42,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:42,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:27:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:42,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380516767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:42,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:42,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:27:42,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551135776] [2021-07-13 19:27:42,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:27:42,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:27:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:42,664 INFO L87 Difference]: Start difference. First operand 131130 states and 397266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:43,786 INFO L93 Difference]: Finished difference Result 131365 states and 397609 transitions. [2021-07-13 19:27:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:27:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:27:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:44,285 INFO L225 Difference]: With dead ends: 131365 [2021-07-13 19:27:44,285 INFO L226 Difference]: Without dead ends: 131362 [2021-07-13 19:27:44,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:27:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131362 states. [2021-07-13 19:27:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131362 to 131116. [2021-07-13 19:27:47,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.029531327460626) internal successors, (397217), 131115 states have internal predecessors, (397217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397217 transitions. [2021-07-13 19:27:48,523 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397217 transitions. Word has length 24 [2021-07-13 19:27:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:48,524 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397217 transitions. [2021-07-13 19:27:48,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397217 transitions. [2021-07-13 19:27:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:48,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:48,593 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:48,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9995 [2021-07-13 19:27:48,793 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:48,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1520903152, now seen corresponding path program 286 times [2021-07-13 19:27:48,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:48,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775002298] [2021-07-13 19:27:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:49,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775002298] [2021-07-13 19:27:49,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775002298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977888147] [2021-07-13 19:27:49,353 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:49,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:49,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:49,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:27:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:27:49,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977888147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:49,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:49,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-13 19:27:49,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693026099] [2021-07-13 19:27:49,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:27:49,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:27:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:49,461 INFO L87 Difference]: Start difference. First operand 131116 states and 397217 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:50,679 INFO L93 Difference]: Finished difference Result 131356 states and 397566 transitions. [2021-07-13 19:27:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:27:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:27:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:51,194 INFO L225 Difference]: With dead ends: 131356 [2021-07-13 19:27:51,194 INFO L226 Difference]: Without dead ends: 131351 [2021-07-13 19:27:51,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 659.1ms TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:27:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131351 states. [2021-07-13 19:27:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131351 to 131116. [2021-07-13 19:27:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0294016702894404) internal successors, (397200), 131115 states have internal predecessors, (397200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397200 transitions. [2021-07-13 19:27:55,646 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397200 transitions. Word has length 24 [2021-07-13 19:27:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:55,646 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397200 transitions. [2021-07-13 19:27:55,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397200 transitions. [2021-07-13 19:27:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:27:55,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:55,714 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:55,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9996 [2021-07-13 19:27:55,914 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:55,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:55,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1679972556, now seen corresponding path program 287 times [2021-07-13 19:27:55,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:55,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923943370] [2021-07-13 19:27:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:56,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:56,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923943370] [2021-07-13 19:27:56,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923943370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:56,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825847857] [2021-07-13 19:27:56,032 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:56,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:27:56,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:27:56,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:27:56,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825847857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:56,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:56,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-13 19:27:56,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659223687] [2021-07-13 19:27:56,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:27:56,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:27:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:56,106 INFO L87 Difference]: Start difference. First operand 131116 states and 397200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:56,671 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 19:27:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:57,322 INFO L93 Difference]: Finished difference Result 131372 states and 397726 transitions. [2021-07-13 19:27:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:27:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:27:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:58,099 INFO L225 Difference]: With dead ends: 131372 [2021-07-13 19:27:58,099 INFO L226 Difference]: Without dead ends: 131369 [2021-07-13 19:27:58,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 583.8ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:27:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131369 states. [2021-07-13 19:28:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131369 to 131116. [2021-07-13 19:28:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0293787896121724) internal successors, (397197), 131115 states have internal predecessors, (397197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397197 transitions. [2021-07-13 19:28:02,339 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397197 transitions. Word has length 24 [2021-07-13 19:28:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:02,339 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397197 transitions. [2021-07-13 19:28:02,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397197 transitions. [2021-07-13 19:28:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:02,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:02,412 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:02,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9997,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:02,613 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash 542222794, now seen corresponding path program 288 times [2021-07-13 19:28:02,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:02,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497503082] [2021-07-13 19:28:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:28:02,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:02,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497503082] [2021-07-13 19:28:02,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497503082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:02,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225127452] [2021-07-13 19:28:02,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:02,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:28:02,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:28:02,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:28:02,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225127452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:02,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:02,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:28:02,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463108605] [2021-07-13 19:28:02,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:02,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:02,752 INFO L87 Difference]: Start difference. First operand 131116 states and 397197 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:03,977 INFO L93 Difference]: Finished difference Result 131414 states and 397691 transitions. [2021-07-13 19:28:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:03,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:04,521 INFO L225 Difference]: With dead ends: 131414 [2021-07-13 19:28:04,522 INFO L226 Difference]: Without dead ends: 131412 [2021-07-13 19:28:04,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131412 states. [2021-07-13 19:28:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131412 to 131150. [2021-07-13 19:28:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.029096676299476) internal successors, (397263), 131149 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 397263 transitions. [2021-07-13 19:28:09,302 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 397263 transitions. Word has length 24 [2021-07-13 19:28:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:09,302 INFO L482 AbstractCegarLoop]: Abstraction has 131150 states and 397263 transitions. [2021-07-13 19:28:09,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 397263 transitions. [2021-07-13 19:28:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:09,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:09,362 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:09,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9998 [2021-07-13 19:28:09,564 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2007289812, now seen corresponding path program 289 times [2021-07-13 19:28:09,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:09,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668763787] [2021-07-13 19:28:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:09,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668763787] [2021-07-13 19:28:09,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668763787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635718333] [2021-07-13 19:28:09,628 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:09,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:28:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:28:09,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635718333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:09,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:28:09,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294456434] [2021-07-13 19:28:09,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:28:09,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:28:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:28:09,716 INFO L87 Difference]: Start difference. First operand 131150 states and 397263 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:10,870 INFO L93 Difference]: Finished difference Result 131457 states and 397741 transitions. [2021-07-13 19:28:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:28:10,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:11,379 INFO L225 Difference]: With dead ends: 131457 [2021-07-13 19:28:11,379 INFO L226 Difference]: Without dead ends: 131452 [2021-07-13 19:28:11,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-07-13 19:28:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131114. [2021-07-13 19:28:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131114 states, 131113 states have (on average 3.028967379283519) internal successors, (397137), 131113 states have internal predecessors, (397137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131114 states to 131114 states and 397137 transitions. [2021-07-13 19:28:15,680 INFO L78 Accepts]: Start accepts. Automaton has 131114 states and 397137 transitions. Word has length 24 [2021-07-13 19:28:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:15,681 INFO L482 AbstractCegarLoop]: Abstraction has 131114 states and 397137 transitions. [2021-07-13 19:28:15,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 131114 states and 397137 transitions. [2021-07-13 19:28:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:16,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:16,268 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:16,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9999,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:16,469 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash -296676504, now seen corresponding path program 290 times [2021-07-13 19:28:16,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:16,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716197664] [2021-07-13 19:28:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:16,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:16,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716197664] [2021-07-13 19:28:16,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716197664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072230815] [2021-07-13 19:28:16,552 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:16,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:28:16,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072230815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:16,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-07-13 19:28:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729237360] [2021-07-13 19:28:16,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:28:16,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:28:16,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:16,625 INFO L87 Difference]: Start difference. First operand 131114 states and 397137 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:17,796 INFO L93 Difference]: Finished difference Result 131477 states and 397730 transitions. [2021-07-13 19:28:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:28:17,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:18,365 INFO L225 Difference]: With dead ends: 131477 [2021-07-13 19:28:18,365 INFO L226 Difference]: Without dead ends: 131475 [2021-07-13 19:28:18,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131475 states. [2021-07-13 19:28:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131475 to 131109. [2021-07-13 19:28:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131109 states, 131108 states have (on average 3.0287701742075237) internal successors, (397096), 131108 states have internal predecessors, (397096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131109 states to 131109 states and 397096 transitions. [2021-07-13 19:28:23,037 INFO L78 Accepts]: Start accepts. Automaton has 131109 states and 397096 transitions. Word has length 24 [2021-07-13 19:28:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:23,037 INFO L482 AbstractCegarLoop]: Abstraction has 131109 states and 397096 transitions. [2021-07-13 19:28:23,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 131109 states and 397096 transitions. [2021-07-13 19:28:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:23,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:23,099 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:23,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10000 [2021-07-13 19:28:23,300 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1192728492, now seen corresponding path program 291 times [2021-07-13 19:28:23,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:23,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432269966] [2021-07-13 19:28:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:23,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:23,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432269966] [2021-07-13 19:28:23,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432269966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:23,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108948765] [2021-07-13 19:28:23,382 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:23,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:28:23,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:28:23,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:23,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108948765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:23,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:23,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:28:23,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927324660] [2021-07-13 19:28:23,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:28:23,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:28:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:23,454 INFO L87 Difference]: Start difference. First operand 131109 states and 397096 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:23,913 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 19:28:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:24,685 INFO L93 Difference]: Finished difference Result 131340 states and 397434 transitions. [2021-07-13 19:28:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:28:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:25,475 INFO L225 Difference]: With dead ends: 131340 [2021-07-13 19:28:25,475 INFO L226 Difference]: Without dead ends: 131337 [2021-07-13 19:28:25,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:28:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131337 states. [2021-07-13 19:28:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131337 to 131102. [2021-07-13 19:28:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.0285733899817697) internal successors, (397049), 131101 states have internal predecessors, (397049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397049 transitions. [2021-07-13 19:28:29,567 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397049 transitions. Word has length 24 [2021-07-13 19:28:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:29,567 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397049 transitions. [2021-07-13 19:28:29,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397049 transitions. [2021-07-13 19:28:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:29,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:29,633 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:29,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10001,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:29,834 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash 119643112, now seen corresponding path program 292 times [2021-07-13 19:28:29,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:29,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389503113] [2021-07-13 19:28:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:29,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:29,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389503113] [2021-07-13 19:28:29,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389503113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:29,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608615786] [2021-07-13 19:28:29,918 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:29,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:29,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:29,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:28:29,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608615786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:29,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:29,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-07-13 19:28:29,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425785384] [2021-07-13 19:28:29,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:29,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:29,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:29,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:29,983 INFO L87 Difference]: Start difference. First operand 131102 states and 397049 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:31,195 INFO L93 Difference]: Finished difference Result 131338 states and 397393 transitions. [2021-07-13 19:28:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:28:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:31,930 INFO L225 Difference]: With dead ends: 131338 [2021-07-13 19:28:31,930 INFO L226 Difference]: Without dead ends: 131333 [2021-07-13 19:28:31,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:28:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131333 states. [2021-07-13 19:28:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131333 to 131102. [2021-07-13 19:28:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.028352186482178) internal successors, (397020), 131101 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397020 transitions. [2021-07-13 19:28:36,243 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397020 transitions. Word has length 24 [2021-07-13 19:28:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:36,243 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397020 transitions. [2021-07-13 19:28:36,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397020 transitions. [2021-07-13 19:28:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:36,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:36,312 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:36,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10002 [2021-07-13 19:28:36,513 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:36,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1213734700, now seen corresponding path program 293 times [2021-07-13 19:28:36,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:36,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158168527] [2021-07-13 19:28:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:36,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:36,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158168527] [2021-07-13 19:28:36,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158168527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:36,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345455335] [2021-07-13 19:28:36,623 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:36,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:28:36,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:36,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:28:36,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:36,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345455335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:36,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:36,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:28:36,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192054224] [2021-07-13 19:28:36,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:36,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:36,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:36,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:36,694 INFO L87 Difference]: Start difference. First operand 131102 states and 397020 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:37,900 INFO L93 Difference]: Finished difference Result 131408 states and 397643 transitions. [2021-07-13 19:28:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:28:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:38,437 INFO L225 Difference]: With dead ends: 131408 [2021-07-13 19:28:38,437 INFO L226 Difference]: Without dead ends: 131405 [2021-07-13 19:28:38,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:28:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131405 states. [2021-07-13 19:28:41,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131405 to 131104. [2021-07-13 19:28:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.028328871192879) internal successors, (397023), 131103 states have internal predecessors, (397023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397023 transitions. [2021-07-13 19:28:43,079 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397023 transitions. Word has length 24 [2021-07-13 19:28:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:43,079 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397023 transitions. [2021-07-13 19:28:43,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397023 transitions. [2021-07-13 19:28:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:43,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:43,152 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:43,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10003,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:43,352 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash 770835560, now seen corresponding path program 294 times [2021-07-13 19:28:43,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:43,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248359660] [2021-07-13 19:28:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:43,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248359660] [2021-07-13 19:28:43,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248359660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279386965] [2021-07-13 19:28:43,449 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:43,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:28:43,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:43,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:28:43,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:43,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279386965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:43,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:43,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:28:43,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2753878] [2021-07-13 19:28:43,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:43,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:43,521 INFO L87 Difference]: Start difference. First operand 131104 states and 397023 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:44,641 INFO L93 Difference]: Finished difference Result 131400 states and 397630 transitions. [2021-07-13 19:28:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:28:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:45,134 INFO L225 Difference]: With dead ends: 131400 [2021-07-13 19:28:45,135 INFO L226 Difference]: Without dead ends: 131396 [2021-07-13 19:28:45,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:28:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131396 states. [2021-07-13 19:28:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131396 to 131104. [2021-07-13 19:28:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0283059884213177) internal successors, (397020), 131103 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397020 transitions. [2021-07-13 19:28:49,260 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397020 transitions. Word has length 24 [2021-07-13 19:28:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:49,260 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397020 transitions. [2021-07-13 19:28:49,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397020 transitions. [2021-07-13 19:28:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:49,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:49,789 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:50,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10004 [2021-07-13 19:28:50,005 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:50,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1666696844, now seen corresponding path program 295 times [2021-07-13 19:28:50,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:50,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436011330] [2021-07-13 19:28:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:50,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:50,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436011330] [2021-07-13 19:28:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436011330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:50,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058273170] [2021-07-13 19:28:50,086 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:50,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:28:50,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058273170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:50,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:50,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-07-13 19:28:50,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257170094] [2021-07-13 19:28:50,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:28:50,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:50,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:28:50,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:50,152 INFO L87 Difference]: Start difference. First operand 131104 states and 397020 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:51,284 INFO L93 Difference]: Finished difference Result 131360 states and 397542 transitions. [2021-07-13 19:28:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:28:51,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:51,752 INFO L225 Difference]: With dead ends: 131360 [2021-07-13 19:28:51,753 INFO L226 Difference]: Without dead ends: 131357 [2021-07-13 19:28:51,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:28:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131357 states. [2021-07-13 19:28:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131357 to 131089. [2021-07-13 19:28:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131089 states, 131088 states have (on average 3.0283626266324912) internal successors, (396982), 131088 states have internal predecessors, (396982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131089 states to 131089 states and 396982 transitions. [2021-07-13 19:28:55,898 INFO L78 Accepts]: Start accepts. Automaton has 131089 states and 396982 transitions. Word has length 24 [2021-07-13 19:28:55,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:55,898 INFO L482 AbstractCegarLoop]: Abstraction has 131089 states and 396982 transitions. [2021-07-13 19:28:55,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 131089 states and 396982 transitions. [2021-07-13 19:28:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:28:55,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:55,967 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:56,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10005 [2021-07-13 19:28:56,168 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1360813274, now seen corresponding path program 296 times [2021-07-13 19:28:56,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:56,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334986744] [2021-07-13 19:28:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:56,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:56,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334986744] [2021-07-13 19:28:56,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334986744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:56,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454664918] [2021-07-13 19:28:56,280 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:56,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:56,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:56,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:28:56,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454664918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:56,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:56,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-07-13 19:28:56,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174486222] [2021-07-13 19:28:56,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:56,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:56,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:56,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:56,346 INFO L87 Difference]: Start difference. First operand 131089 states and 396982 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:28:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:57,589 INFO L93 Difference]: Finished difference Result 131311 states and 397318 transitions. [2021-07-13 19:28:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:28:57,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:28:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:58,519 INFO L225 Difference]: With dead ends: 131311 [2021-07-13 19:28:58,520 INFO L226 Difference]: Without dead ends: 131308 [2021-07-13 19:28:58,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 581.4ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:28:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-07-13 19:29:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131087. [2021-07-13 19:29:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131087 states, 131086 states have (on average 3.028195230611965) internal successors, (396954), 131086 states have internal predecessors, (396954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131087 states to 131087 states and 396954 transitions. [2021-07-13 19:29:02,796 INFO L78 Accepts]: Start accepts. Automaton has 131087 states and 396954 transitions. Word has length 24 [2021-07-13 19:29:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:02,796 INFO L482 AbstractCegarLoop]: Abstraction has 131087 states and 396954 transitions. [2021-07-13 19:29:02,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 131087 states and 396954 transitions. [2021-07-13 19:29:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:29:02,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:02,862 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:03,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10006 [2021-07-13 19:29:03,062 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash 917914134, now seen corresponding path program 297 times [2021-07-13 19:29:03,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:03,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062774781] [2021-07-13 19:29:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:03,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062774781] [2021-07-13 19:29:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062774781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767008797] [2021-07-13 19:29:03,157 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:03,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:29:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:29:03,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:03,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767008797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:03,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:03,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:29:03,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510718153] [2021-07-13 19:29:03,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:29:03,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:29:03,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:03,228 INFO L87 Difference]: Start difference. First operand 131087 states and 396954 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:04,457 INFO L93 Difference]: Finished difference Result 131552 states and 397896 transitions. [2021-07-13 19:29:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:29:04,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:29:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:04,933 INFO L225 Difference]: With dead ends: 131552 [2021-07-13 19:29:04,933 INFO L226 Difference]: Without dead ends: 131544 [2021-07-13 19:29:04,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:29:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131544 states. [2021-07-13 19:29:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131544 to 131094. [2021-07-13 19:29:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131094 states, 131093 states have (on average 3.0281555842035806) internal successors, (396970), 131093 states have internal predecessors, (396970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131094 states to 131094 states and 396970 transitions. [2021-07-13 19:29:09,502 INFO L78 Accepts]: Start accepts. Automaton has 131094 states and 396970 transitions. Word has length 24 [2021-07-13 19:29:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:09,502 INFO L482 AbstractCegarLoop]: Abstraction has 131094 states and 396970 transitions. [2021-07-13 19:29:09,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 131094 states and 396970 transitions. [2021-07-13 19:29:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:29:09,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:09,566 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:09,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10007,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:09,766 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash 52834514, now seen corresponding path program 298 times [2021-07-13 19:29:09,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:09,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793353550] [2021-07-13 19:29:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:29:09,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793353550] [2021-07-13 19:29:09,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793353550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519698703] [2021-07-13 19:29:09,827 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:09,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:09,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:29:09,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:29:09,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519698703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:09,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:09,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:29:09,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589769797] [2021-07-13 19:29:09,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:09,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:09,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:09,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:09,901 INFO L87 Difference]: Start difference. First operand 131094 states and 396970 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:10,977 INFO L93 Difference]: Finished difference Result 131378 states and 397470 transitions. [2021-07-13 19:29:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:29:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:11,498 INFO L225 Difference]: With dead ends: 131378 [2021-07-13 19:29:11,498 INFO L226 Difference]: Without dead ends: 131378 [2021-07-13 19:29:11,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131378 states. [2021-07-13 19:29:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131378 to 131115. [2021-07-13 19:29:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0280900590325976) internal successors, (397025), 131114 states have internal predecessors, (397025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 397025 transitions. [2021-07-13 19:29:15,680 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 397025 transitions. Word has length 24 [2021-07-13 19:29:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:15,680 INFO L482 AbstractCegarLoop]: Abstraction has 131115 states and 397025 transitions. [2021-07-13 19:29:15,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 397025 transitions. [2021-07-13 19:29:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:29:15,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:15,750 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:15,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10008 [2021-07-13 19:29:15,951 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289204, now seen corresponding path program 299 times [2021-07-13 19:29:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:15,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230155670] [2021-07-13 19:29:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:29:16,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230155670] [2021-07-13 19:29:16,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230155670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775682438] [2021-07-13 19:29:16,509 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:16,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:29:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:29:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:29:16,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775682438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:16,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:16,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:29:16,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565393519] [2021-07-13 19:29:16,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:16,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:16,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:16,589 INFO L87 Difference]: Start difference. First operand 131115 states and 397025 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:17,700 INFO L93 Difference]: Finished difference Result 131464 states and 397561 transitions. [2021-07-13 19:29:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:29:17,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:29:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:18,200 INFO L225 Difference]: With dead ends: 131464 [2021-07-13 19:29:18,200 INFO L226 Difference]: Without dead ends: 131461 [2021-07-13 19:29:18,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131461 states. [2021-07-13 19:29:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131461 to 131127. [2021-07-13 19:29:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131127 states, 131126 states have (on average 3.0277290544972013) internal successors, (397014), 131126 states have internal predecessors, (397014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131127 states to 131127 states and 397014 transitions. [2021-07-13 19:29:22,281 INFO L78 Accepts]: Start accepts. Automaton has 131127 states and 397014 transitions. Word has length 24 [2021-07-13 19:29:22,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:22,281 INFO L482 AbstractCegarLoop]: Abstraction has 131127 states and 397014 transitions. [2021-07-13 19:29:22,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 131127 states and 397014 transitions. [2021-07-13 19:29:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:29:22,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:22,345 INFO L508 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:22,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10009,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:22,545 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash 703340212, now seen corresponding path program 300 times [2021-07-13 19:29:22,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:22,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560359123] [2021-07-13 19:29:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:22,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560359123] [2021-07-13 19:29:22,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560359123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894620506] [2021-07-13 19:29:22,619 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:22,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:29:22,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:29:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894620506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:22,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:29:22,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722734899] [2021-07-13 19:29:22,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:29:22,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:29:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:22,693 INFO L87 Difference]: Start difference. First operand 131127 states and 397014 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:23,894 INFO L93 Difference]: Finished difference Result 131365 states and 397357 transitions. [2021-07-13 19:29:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:29:23,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:29:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:24,650 INFO L225 Difference]: With dead ends: 131365 [2021-07-13 19:29:24,651 INFO L226 Difference]: Without dead ends: 131358 [2021-07-13 19:29:24,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:29:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131358 states. Received shutdown request... [2021-07-13 19:29:25,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10010,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:25,916 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:29:25,918 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:29:25,919 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:29:25,920 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:29:25 BasicIcfg [2021-07-13 19:29:25,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:29:25,920 INFO L168 Benchmark]: Toolchain (without parser) took 752456.67 ms. Allocated memory was 206.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 186.2 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.1 GB. Max. memory is 8.0 GB. [2021-07-13 19:29:25,921 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 206.6 MB. Free memory is still 187.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:29:25,921 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.80 ms. Allocated memory is still 206.6 MB. Free memory was 186.1 MB in the beginning and 184.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:29:25,921 INFO L168 Benchmark]: Boogie Preprocessor took 13.66 ms. Allocated memory is still 206.6 MB. Free memory was 184.7 MB in the beginning and 183.7 MB in the end (delta: 950.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:29:25,921 INFO L168 Benchmark]: RCFGBuilder took 269.55 ms. Allocated memory is still 206.6 MB. Free memory was 183.7 MB in the beginning and 168.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-13 19:29:25,921 INFO L168 Benchmark]: TraceAbstraction took 752145.07 ms. Allocated memory was 206.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 168.2 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.1 GB. Max. memory is 8.0 GB. [2021-07-13 19:29:25,921 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 0.11 ms. Allocated memory is still 206.6 MB. Free memory is still 187.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.80 ms. Allocated memory is still 206.6 MB. Free memory was 186.1 MB in the beginning and 184.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.66 ms. Allocated memory is still 206.6 MB. Free memory was 184.7 MB in the beginning and 183.7 MB in the end (delta: 950.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 269.55 ms. Allocated memory is still 206.6 MB. Free memory was 183.7 MB in the beginning and 168.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 752145.07 ms. Allocated memory was 206.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 168.2 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 752075.9ms, OverallIterations: 304, TraceHistogramMax: 12, EmptinessCheckTime: 6604.0ms, AutomataDifference: 154790.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5144 SDtfs, 23291 SDslu, 29679 SDs, 0 SdLazy, 39093 SolverSat, 7497 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19234.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12581 GetRequests, 5731 SyntacticMatches, 165 SemanticMatches, 6685 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43017 ImplicationChecksByTransitivity, 48902.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131189occurred in iteration=286, InterpolantAutomatonStates: 5882, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 286650.0ms AutomataMinimizationTime, 304 MinimizatonAttempts, 517986 StatesRemovedByMinimization, 298 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1000.9ms SsaConstructionTime, 4517.6ms SatisfiabilityAnalysisTime, 230017.8ms InterpolantComputationTime, 12149 NumberOfCodeBlocks, 12148 NumberOfCodeBlocksAsserted, 1347 NumberOfCheckSat, 11544 ConstructedInterpolants, 0 QuantifiedInterpolants, 51284 SizeOfPredicates, 143 NumberOfNonLiveVariables, 24576 ConjunctsInSsa, 4149 ConjunctsInUnsatCore, 605 InterpolantComputations, 3 PerfectInterpolantSequences, 9630/27730 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