/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:12:17,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:12:17,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:12:17,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:12:17,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:12:17,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:12:17,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:12:17,116 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-Separate.epf [2021-06-05 14:12:17,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:12:17,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:12:17,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:12:17,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:12:17,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:12:17,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:12:17,146 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:12:17,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:12:17,146 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:12:17,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:12:17,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:12:17,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:12:17,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:12:17,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:12:17,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:12:17,147 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:12:17,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:12:17,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:12:17,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:12:17,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:12:17,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:12:17,149 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:12:17,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:12:17,149 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:12:17,149 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:12:17,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:12:17,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:12:17,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:12:17,407 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:12:17,408 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:12:17,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2021-06-05 14:12:17,409 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2021-06-05 14:12:17,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:12:17,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:12:17,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:12:17,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:12:17,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:12:17,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:12:17,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:12:17,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:12:17,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:12:17,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... [2021-06-05 14:12:17,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:12:17,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:12:17,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:12:17,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:12:17,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:12:17,525 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:12:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:12:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:12:17,525 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:12:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:12:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:12:17,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:12:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:12:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:12:17,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:12:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:12:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:12:17,526 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 14:12:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 14:12:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 14:12:17,527 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:12:17,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:12:17,699 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:12:17,700 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:12:17 BoogieIcfgContainer [2021-06-05 14:12:17,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:12:17,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:12:17,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:12:17,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:12:17,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:12:17" (1/2) ... [2021-06-05 14:12:17,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebe4d89 and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:12:17, skipping insertion in model container [2021-06-05 14:12:17,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:12:17" (2/2) ... [2021-06-05 14:12:17,705 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2021-06-05 14:12:17,725 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:12:17,725 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:12:17,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:12:17,737 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:12:17,798 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 14:12:17,815 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 14:12:17,842 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:12:17,842 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:12:17,842 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:12:17,842 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:12:17,842 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:12:17,842 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:12:17,842 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:12:17,842 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:12:17,853 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2021-06-05 14:12:17,921 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:12:17,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:17,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:17,945 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash 500910984, now seen corresponding path program 1 times [2021-06-05 14:12:17,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:17,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112897252] [2021-06-05 14:12:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:18,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:18,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112897252] [2021-06-05 14:12:18,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112897252] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:18,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:18,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:12:18,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433212640] [2021-06-05 14:12:18,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:12:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:18,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:12:18,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:12:18,083 INFO L87 Difference]: Start difference. First operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 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) [2021-06-05 14:12:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:18,155 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2021-06-05 14:12:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:12:18,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:12:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:18,177 INFO L225 Difference]: With dead ends: 1365 [2021-06-05 14:12:18,177 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 14:12:18,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:12:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 14:12:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2021-06-05 14:12:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.903558052434457) internal successors, (4169), 1068 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2021-06-05 14:12:18,258 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2021-06-05 14:12:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:18,259 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2021-06-05 14:12:18,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2021-06-05 14:12:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2021-06-05 14:12:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:18,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:18,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:18,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:12:18,263 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:18,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1942329299, now seen corresponding path program 1 times [2021-06-05 14:12:18,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:18,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942165890] [2021-06-05 14:12:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:18,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:18,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942165890] [2021-06-05 14:12:18,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942165890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:18,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085108623] [2021-06-05 14:12:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:18,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:12:18,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:18,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085108623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:18,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:18,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 14:12:18,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804210236] [2021-06-05 14:12:18,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:12:18,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:18,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:12:18,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:12:18,498 INFO L87 Difference]: Start difference. First operand 1069 states and 4169 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:18,631 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2021-06-05 14:12:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-06-05 14:12:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:18,644 INFO L225 Difference]: With dead ends: 2313 [2021-06-05 14:12:18,644 INFO L226 Difference]: Without dead ends: 2313 [2021-06-05 14:12:18,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-06-05 14:12:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2021-06-05 14:12:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9710843373493976) internal successors, (4944), 1245 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2021-06-05 14:12:18,726 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2021-06-05 14:12:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:18,727 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2021-06-05 14:12:18,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2021-06-05 14:12:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:18,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:18,730 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:18,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 14:12:18,932 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash -977644340, now seen corresponding path program 1 times [2021-06-05 14:12:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:18,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214954592] [2021-06-05 14:12:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:18,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:18,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214954592] [2021-06-05 14:12:18,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214954592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:18,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208627981] [2021-06-05 14:12:18,991 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 [2021-06-05 14:12:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:12:19,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:19,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208627981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:19,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:19,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 14:12:19,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289917417] [2021-06-05 14:12:19,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:12:19,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:19,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:12:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:12:19,090 INFO L87 Difference]: Start difference. First operand 1246 states and 4944 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:19,153 INFO L93 Difference]: Finished difference Result 2518 states and 9792 transitions. [2021-06-05 14:12:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-06-05 14:12:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:19,168 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 14:12:19,169 INFO L226 Difference]: Without dead ends: 2518 [2021-06-05 14:12:19,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-06-05 14:12:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1535. [2021-06-05 14:12:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 4.046284224250326) internal successors, (6207), 1534 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6207 transitions. [2021-06-05 14:12:19,225 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6207 transitions. Word has length 22 [2021-06-05 14:12:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:19,225 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6207 transitions. [2021-06-05 14:12:19,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6207 transitions. [2021-06-05 14:12:19,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:19,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:19,230 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:19,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:19,445 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1634054805, now seen corresponding path program 1 times [2021-06-05 14:12:19,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:19,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21814519] [2021-06-05 14:12:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:19,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:19,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21814519] [2021-06-05 14:12:19,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21814519] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:19,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:19,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:12:19,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533394082] [2021-06-05 14:12:19,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:12:19,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:19,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:12:19,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:12:19,486 INFO L87 Difference]: Start difference. First operand 1535 states and 6207 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:19,549 INFO L93 Difference]: Finished difference Result 2143 states and 8381 transitions. [2021-06-05 14:12:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:19,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-06-05 14:12:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:19,560 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 14:12:19,560 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 14:12:19,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 14:12:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1600. [2021-06-05 14:12:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.9987492182614135) internal successors, (6394), 1599 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6394 transitions. [2021-06-05 14:12:19,664 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6394 transitions. Word has length 22 [2021-06-05 14:12:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:19,665 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 6394 transitions. [2021-06-05 14:12:19,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6394 transitions. [2021-06-05 14:12:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:19,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:19,670 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:19,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:12:19,670 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2015216124, now seen corresponding path program 1 times [2021-06-05 14:12:19,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:19,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826651697] [2021-06-05 14:12:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:19,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:19,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826651697] [2021-06-05 14:12:19,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826651697] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:19,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:19,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:12:19,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985417562] [2021-06-05 14:12:19,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:12:19,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:19,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:12:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:12:19,701 INFO L87 Difference]: Start difference. First operand 1600 states and 6394 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:19,756 INFO L93 Difference]: Finished difference Result 2353 states and 9126 transitions. [2021-06-05 14:12:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:19,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-06-05 14:12:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:19,768 INFO L225 Difference]: With dead ends: 2353 [2021-06-05 14:12:19,768 INFO L226 Difference]: Without dead ends: 2337 [2021-06-05 14:12:19,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-05 14:12:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1670. [2021-06-05 14:12:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.9622528460155784) internal successors, (6613), 1669 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 6613 transitions. [2021-06-05 14:12:19,816 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 6613 transitions. Word has length 22 [2021-06-05 14:12:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:19,817 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 6613 transitions. [2021-06-05 14:12:19,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 6613 transitions. [2021-06-05 14:12:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:19,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:19,821 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:19,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:12:19,821 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:19,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1699108399, now seen corresponding path program 2 times [2021-06-05 14:12:19,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:19,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605459759] [2021-06-05 14:12:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:19,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:19,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605459759] [2021-06-05 14:12:19,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605459759] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:19,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:19,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:12:19,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359140060] [2021-06-05 14:12:19,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:12:19,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:19,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:12:19,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:12:19,864 INFO L87 Difference]: Start difference. First operand 1670 states and 6613 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:19,928 INFO L93 Difference]: Finished difference Result 2314 states and 9023 transitions. [2021-06-05 14:12:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:19,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-06-05 14:12:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:19,951 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 14:12:19,951 INFO L226 Difference]: Without dead ends: 2314 [2021-06-05 14:12:19,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-05 14:12:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1847. [2021-06-05 14:12:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.978331527627302) internal successors, (7344), 1846 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 7344 transitions. [2021-06-05 14:12:19,997 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 7344 transitions. Word has length 22 [2021-06-05 14:12:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:19,997 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 7344 transitions. [2021-06-05 14:12:19,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 7344 transitions. [2021-06-05 14:12:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:20,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:20,002 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:20,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:12:20,002 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1727272710, now seen corresponding path program 2 times [2021-06-05 14:12:20,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:20,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872220837] [2021-06-05 14:12:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:20,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:20,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872220837] [2021-06-05 14:12:20,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872220837] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:20,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:20,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:12:20,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802246531] [2021-06-05 14:12:20,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:12:20,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:20,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:12:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:12:20,046 INFO L87 Difference]: Start difference. First operand 1847 states and 7344 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:20,092 INFO L93 Difference]: Finished difference Result 2315 states and 8927 transitions. [2021-06-05 14:12:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:20,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-06-05 14:12:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:20,099 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 14:12:20,100 INFO L226 Difference]: Without dead ends: 2297 [2021-06-05 14:12:20,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-05 14:12:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1919. [2021-06-05 14:12:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.946298227320125) internal successors, (7569), 1918 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2021-06-05 14:12:20,204 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2021-06-05 14:12:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:20,204 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2021-06-05 14:12:20,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2021-06-05 14:12:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:20,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:20,210 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:20,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:12:20,210 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -264076448, now seen corresponding path program 2 times [2021-06-05 14:12:20,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:20,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892684503] [2021-06-05 14:12:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:20,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892684503] [2021-06-05 14:12:20,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892684503] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:20,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:20,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:12:20,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447524413] [2021-06-05 14:12:20,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:12:20,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:20,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:12:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:12:20,248 INFO L87 Difference]: Start difference. First operand 1919 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:20,403 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2021-06-05 14:12:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:20,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-06-05 14:12:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:20,415 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 14:12:20,415 INFO L226 Difference]: Without dead ends: 2879 [2021-06-05 14:12:20,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-05 14:12:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2021-06-05 14:12:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.964137931034483) internal successors, (8622), 2175 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2021-06-05 14:12:20,482 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2021-06-05 14:12:20,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:20,483 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2021-06-05 14:12:20,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2021-06-05 14:12:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:20,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:20,491 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:20,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:12:20,491 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1299303677, now seen corresponding path program 2 times [2021-06-05 14:12:20,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:20,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832933023] [2021-06-05 14:12:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:20,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:20,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832933023] [2021-06-05 14:12:20,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832933023] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:20,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:20,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:12:20,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305893210] [2021-06-05 14:12:20,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:12:20,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:12:20,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:12:20,520 INFO L87 Difference]: Start difference. First operand 2176 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:20,579 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2021-06-05 14:12:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2021-06-05 14:12:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:20,588 INFO L225 Difference]: With dead ends: 2839 [2021-06-05 14:12:20,589 INFO L226 Difference]: Without dead ends: 2811 [2021-06-05 14:12:20,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-06-05 14:12:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2021-06-05 14:12:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.9375545851528386) internal successors, (9017), 2290 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2021-06-05 14:12:20,657 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2021-06-05 14:12:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:20,657 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2021-06-05 14:12:20,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-06-05 14:12:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2021-06-05 14:12:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:12:20,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:20,665 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:20,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:12:20,666 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:20,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2040256713, now seen corresponding path program 1 times [2021-06-05 14:12:20,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:20,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937488561] [2021-06-05 14:12:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:20,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937488561] [2021-06-05 14:12:20,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937488561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630920214] [2021-06-05 14:12:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:20,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:12:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:21,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630920214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:21,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:21,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 14:12:21,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700291077] [2021-06-05 14:12:21,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:12:21,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:21,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:12:21,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:12:21,013 INFO L87 Difference]: Start difference. First operand 2291 states and 9017 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-06-05 14:12:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:21,178 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2021-06-05 14:12:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:12:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 25 [2021-06-05 14:12:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:21,188 INFO L225 Difference]: With dead ends: 3791 [2021-06-05 14:12:21,188 INFO L226 Difference]: Without dead ends: 3655 [2021-06-05 14:12:21,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:12:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2021-06-05 14:12:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2021-06-05 14:12:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 3.9450094161958567) internal successors, (10474), 2655 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2021-06-05 14:12:21,246 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2021-06-05 14:12:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:21,246 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2021-06-05 14:12:21,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-06-05 14:12:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2021-06-05 14:12:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:12:21,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:21,251 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:21,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 14:12:21,468 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash -993904687, now seen corresponding path program 2 times [2021-06-05 14:12:21,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:21,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240096085] [2021-06-05 14:12:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:21,849 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 14:12:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:21,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240096085] [2021-06-05 14:12:21,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240096085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683861927] [2021-06-05 14:12:21,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:21,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:21,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:21,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:12:21,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:22,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683861927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:22,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:22,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-06-05 14:12:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569554070] [2021-06-05 14:12:22,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:12:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:12:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:12:22,144 INFO L87 Difference]: Start difference. First operand 2656 states and 10474 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:22,381 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2021-06-05 14:12:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:12:22,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:12:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:22,391 INFO L225 Difference]: With dead ends: 4004 [2021-06-05 14:12:22,391 INFO L226 Difference]: Without dead ends: 3868 [2021-06-05 14:12:22,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:12:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-06-05 14:12:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2021-06-05 14:12:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.9638795986622073) internal successors, (11852), 2990 states have internal predecessors, (11852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2021-06-05 14:12:22,532 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2021-06-05 14:12:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:22,532 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2021-06-05 14:12:22,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2021-06-05 14:12:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:12:22,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:22,539 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:22,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:22,753 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:22,754 INFO L82 PathProgramCache]: Analyzing trace with hash 455681823, now seen corresponding path program 3 times [2021-06-05 14:12:22,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:22,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443558046] [2021-06-05 14:12:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:12:22,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:22,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443558046] [2021-06-05 14:12:22,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443558046] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:22,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:22,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:12:22,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247860862] [2021-06-05 14:12:22,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:12:22,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:22,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:12:22,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:22,811 INFO L87 Difference]: Start difference. First operand 2991 states and 11852 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:22,927 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2021-06-05 14:12:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:22,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:12:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:22,940 INFO L225 Difference]: With dead ends: 4207 [2021-06-05 14:12:22,940 INFO L226 Difference]: Without dead ends: 4139 [2021-06-05 14:12:22,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-06-05 14:12:23,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2021-06-05 14:12:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.9793424498108814) internal successors, (13677), 3437 states have internal predecessors, (13677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2021-06-05 14:12:23,019 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2021-06-05 14:12:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:23,019 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2021-06-05 14:12:23,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2021-06-05 14:12:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:12:23,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:23,029 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:23,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 14:12:23,029 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash -91124313, now seen corresponding path program 1 times [2021-06-05 14:12:23,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:23,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567870214] [2021-06-05 14:12:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:23,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:23,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567870214] [2021-06-05 14:12:23,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567870214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:23,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619225747] [2021-06-05 14:12:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:23,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:12:23,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:23,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619225747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:23,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:23,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 14:12:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276136865] [2021-06-05 14:12:23,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:12:23,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:12:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:12:23,193 INFO L87 Difference]: Start difference. First operand 3438 states and 13677 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-06-05 14:12:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:23,735 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2021-06-05 14:12:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:12:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 25 [2021-06-05 14:12:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:23,765 INFO L225 Difference]: With dead ends: 4729 [2021-06-05 14:12:23,765 INFO L226 Difference]: Without dead ends: 4627 [2021-06-05 14:12:23,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:12:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-06-05 14:12:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2021-06-05 14:12:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 3.958904109589041) internal successors, (15317), 3869 states have internal predecessors, (15317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2021-06-05 14:12:23,853 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2021-06-05 14:12:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:23,853 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2021-06-05 14:12:23,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-06-05 14:12:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2021-06-05 14:12:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:12:23,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:23,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:24,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 14:12:24,078 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1468953723, now seen corresponding path program 2 times [2021-06-05 14:12:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:24,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908563266] [2021-06-05 14:12:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:24,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:24,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908563266] [2021-06-05 14:12:24,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908563266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:24,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732078818] [2021-06-05 14:12:24,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:24,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:24,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:24,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:12:24,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:24,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732078818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:24,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:24,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-06-05 14:12:24,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530865379] [2021-06-05 14:12:24,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:12:24,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:12:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:12:24,457 INFO L87 Difference]: Start difference. First operand 3870 states and 15317 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:25,093 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2021-06-05 14:12:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:12:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:12:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:25,106 INFO L225 Difference]: With dead ends: 4946 [2021-06-05 14:12:25,106 INFO L226 Difference]: Without dead ends: 4844 [2021-06-05 14:12:25,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:12:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-06-05 14:12:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2021-06-05 14:12:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 3.966618979494516) internal successors, (16636), 4194 states have internal predecessors, (16636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2021-06-05 14:12:25,255 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2021-06-05 14:12:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:25,255 INFO L482 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2021-06-05 14:12:25,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2021-06-05 14:12:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:12:25,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:25,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:25,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:25,493 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash -466013585, now seen corresponding path program 3 times [2021-06-05 14:12:25,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:25,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747450629] [2021-06-05 14:12:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:12:25,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:25,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747450629] [2021-06-05 14:12:25,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747450629] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:12:25,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:12:25,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:12:25,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629753782] [2021-06-05 14:12:25,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:12:25,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:25,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:12:25,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:25,730 INFO L87 Difference]: Start difference. First operand 4195 states and 16636 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:25,846 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2021-06-05 14:12:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:12:25,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:12:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:25,902 INFO L225 Difference]: With dead ends: 5169 [2021-06-05 14:12:25,903 INFO L226 Difference]: Without dead ends: 5118 [2021-06-05 14:12:25,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:12:25,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-06-05 14:12:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2021-06-05 14:12:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 3.9731019522776574) internal successors, (18316), 4610 states have internal predecessors, (18316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2021-06-05 14:12:25,997 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2021-06-05 14:12:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:25,997 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2021-06-05 14:12:25,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2021-06-05 14:12:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:26,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:26,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:26,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 14:12:26,007 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:26,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1201507300, now seen corresponding path program 4 times [2021-06-05 14:12:26,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:26,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944993222] [2021-06-05 14:12:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:26,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:26,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944993222] [2021-06-05 14:12:26,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944993222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:26,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36762701] [2021-06-05 14:12:26,066 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:26,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:26,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:26,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36762701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:26,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:26,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:12:26,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079631508] [2021-06-05 14:12:26,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:26,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:26,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:26,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:26,178 INFO L87 Difference]: Start difference. First operand 4611 states and 18316 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 14:12:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:27,111 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2021-06-05 14:12:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:12:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) Word has length 28 [2021-06-05 14:12:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:27,200 INFO L225 Difference]: With dead ends: 11402 [2021-06-05 14:12:27,200 INFO L226 Difference]: Without dead ends: 11402 [2021-06-05 14:12:27,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:12:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-06-05 14:12:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2021-06-05 14:12:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 4.016151202749141) internal successors, (23374), 5820 states have internal predecessors, (23374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2021-06-05 14:12:27,429 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2021-06-05 14:12:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:27,429 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2021-06-05 14:12:27,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 14:12:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2021-06-05 14:12:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:27,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:27,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:27,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 14:12:27,660 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1181914093, now seen corresponding path program 5 times [2021-06-05 14:12:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:27,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291122723] [2021-06-05 14:12:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:27,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:27,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291122723] [2021-06-05 14:12:27,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291122723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:27,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415394935] [2021-06-05 14:12:27,736 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:27,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:12:27,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:27,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:27,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415394935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:27,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:27,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:12:27,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85659000] [2021-06-05 14:12:27,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:27,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:27,906 INFO L87 Difference]: Start difference. First operand 5821 states and 23374 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:28,768 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2021-06-05 14:12:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:12:28,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:28,809 INFO L225 Difference]: With dead ends: 15383 [2021-06-05 14:12:28,809 INFO L226 Difference]: Without dead ends: 15203 [2021-06-05 14:12:28,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:12:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2021-06-05 14:12:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2021-06-05 14:12:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.118177446501563) internal successors, (34255), 8318 states have internal predecessors, (34255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2021-06-05 14:12:29,524 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2021-06-05 14:12:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:29,524 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2021-06-05 14:12:29,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2021-06-05 14:12:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:29,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:29,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:29,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:12:29,785 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1237707597, now seen corresponding path program 6 times [2021-06-05 14:12:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:29,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580680621] [2021-06-05 14:12:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:29,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:29,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580680621] [2021-06-05 14:12:29,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580680621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:29,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134593964] [2021-06-05 14:12:29,933 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:29,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:12:29,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:29,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:30,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134593964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:30,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:30,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:12:30,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904311669] [2021-06-05 14:12:30,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:12:30,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:12:30,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:12:30,101 INFO L87 Difference]: Start difference. First operand 8319 states and 34255 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:30,706 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2021-06-05 14:12:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:12:30,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 28 [2021-06-05 14:12:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:30,746 INFO L225 Difference]: With dead ends: 16184 [2021-06-05 14:12:30,747 INFO L226 Difference]: Without dead ends: 16184 [2021-06-05 14:12:30,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:12:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2021-06-05 14:12:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2021-06-05 14:12:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.099062274585237) internal successors, (34096), 8318 states have internal predecessors, (34096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2021-06-05 14:12:31,327 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2021-06-05 14:12:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:31,327 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2021-06-05 14:12:31,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2021-06-05 14:12:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:31,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:31,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:31,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:12:31,704 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1493879574, now seen corresponding path program 7 times [2021-06-05 14:12:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:31,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040949254] [2021-06-05 14:12:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:31,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040949254] [2021-06-05 14:12:31,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040949254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211642201] [2021-06-05 14:12:31,756 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:31,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211642201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:31,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:31,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:12:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774030960] [2021-06-05 14:12:31,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:12:31,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:12:31,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:12:31,885 INFO L87 Difference]: Start difference. First operand 8319 states and 34096 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:32,176 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2021-06-05 14:12:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:12:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:32,198 INFO L225 Difference]: With dead ends: 10083 [2021-06-05 14:12:32,199 INFO L226 Difference]: Without dead ends: 10027 [2021-06-05 14:12:32,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:12:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-06-05 14:12:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2021-06-05 14:12:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 4.095975975975976) internal successors, (34099), 8325 states have internal predecessors, (34099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2021-06-05 14:12:32,466 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2021-06-05 14:12:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:32,466 INFO L482 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2021-06-05 14:12:32,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:32,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2021-06-05 14:12:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:32,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:32,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:32,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:32,681 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:32,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:32,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1541673924, now seen corresponding path program 8 times [2021-06-05 14:12:32,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:32,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510282656] [2021-06-05 14:12:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:32,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:32,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510282656] [2021-06-05 14:12:32,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510282656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:32,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364289861] [2021-06-05 14:12:32,734 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:32,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:32,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:32,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:32,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:32,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364289861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:32,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:32,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 14:12:32,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514650606] [2021-06-05 14:12:32,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:32,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:32,948 INFO L87 Difference]: Start difference. First operand 8326 states and 34099 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:33,470 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2021-06-05 14:12:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:12:33,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:33,511 INFO L225 Difference]: With dead ends: 17529 [2021-06-05 14:12:33,511 INFO L226 Difference]: Without dead ends: 17529 [2021-06-05 14:12:33,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:12:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2021-06-05 14:12:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2021-06-05 14:12:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.087296880559839) internal successors, (34460), 8431 states have internal predecessors, (34460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2021-06-05 14:12:33,929 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2021-06-05 14:12:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:33,929 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2021-06-05 14:12:33,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2021-06-05 14:12:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:33,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:33,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:34,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:34,161 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 182486291, now seen corresponding path program 9 times [2021-06-05 14:12:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:34,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905626213] [2021-06-05 14:12:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:34,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:34,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905626213] [2021-06-05 14:12:34,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905626213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:34,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39608076] [2021-06-05 14:12:34,349 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:34,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:12:34,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39608076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:34,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:34,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 14:12:34,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739925915] [2021-06-05 14:12:34,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:34,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:34,528 INFO L87 Difference]: Start difference. First operand 8432 states and 34460 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:35,256 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2021-06-05 14:12:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:12:35,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 28 [2021-06-05 14:12:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:35,395 INFO L225 Difference]: With dead ends: 15647 [2021-06-05 14:12:35,395 INFO L226 Difference]: Without dead ends: 15587 [2021-06-05 14:12:35,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:12:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2021-06-05 14:12:35,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2021-06-05 14:12:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.084924682718539) internal successors, (34440), 8431 states have internal predecessors, (34440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2021-06-05 14:12:35,610 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2021-06-05 14:12:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:35,611 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2021-06-05 14:12:35,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2021-06-05 14:12:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:35,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:35,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:35,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:35,828 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:35,828 INFO L82 PathProgramCache]: Analyzing trace with hash -789657513, now seen corresponding path program 10 times [2021-06-05 14:12:35,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:35,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385250184] [2021-06-05 14:12:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:35,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:35,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385250184] [2021-06-05 14:12:35,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385250184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:35,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857890328] [2021-06-05 14:12:35,852 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:35,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:35,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:35,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:35,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:35,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857890328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:35,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:35,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 14:12:35,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268911568] [2021-06-05 14:12:35,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:35,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:35,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:35,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:35,966 INFO L87 Difference]: Start difference. First operand 8432 states and 34440 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:36,578 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2021-06-05 14:12:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:12:36,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:36,623 INFO L225 Difference]: With dead ends: 18798 [2021-06-05 14:12:36,623 INFO L226 Difference]: Without dead ends: 18798 [2021-06-05 14:12:36,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:12:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2021-06-05 14:12:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2021-06-05 14:12:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.08269884034204) internal successors, (34854), 8537 states have internal predecessors, (34854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2021-06-05 14:12:36,965 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2021-06-05 14:12:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:36,965 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2021-06-05 14:12:36,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2021-06-05 14:12:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:36,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:36,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:37,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 14:12:37,191 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:37,191 INFO L82 PathProgramCache]: Analyzing trace with hash 773722612, now seen corresponding path program 11 times [2021-06-05 14:12:37,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:37,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738228758] [2021-06-05 14:12:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:37,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:37,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738228758] [2021-06-05 14:12:37,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738228758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:37,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560242466] [2021-06-05 14:12:37,223 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:37,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:12:37,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:37,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:37,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560242466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:37,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:37,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 14:12:37,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957357054] [2021-06-05 14:12:37,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:37,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:37,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:37,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:37,406 INFO L87 Difference]: Start difference. First operand 8538 states and 34854 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-06-05 14:12:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:37,922 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2021-06-05 14:12:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:12:37,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 28 [2021-06-05 14:12:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:37,994 INFO L225 Difference]: With dead ends: 14070 [2021-06-05 14:12:37,994 INFO L226 Difference]: Without dead ends: 14014 [2021-06-05 14:12:37,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:12:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2021-06-05 14:12:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2021-06-05 14:12:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.080356096989575) internal successors, (34834), 8537 states have internal predecessors, (34834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2021-06-05 14:12:38,309 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2021-06-05 14:12:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:38,309 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2021-06-05 14:12:38,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-06-05 14:12:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2021-06-05 14:12:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:38,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:38,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:38,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:38,545 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:38,546 INFO L82 PathProgramCache]: Analyzing trace with hash 47154117, now seen corresponding path program 12 times [2021-06-05 14:12:38,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:38,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911188327] [2021-06-05 14:12:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:38,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911188327] [2021-06-05 14:12:38,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911188327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965982573] [2021-06-05 14:12:38,601 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:38,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:12:38,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:38,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965982573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:38,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:38,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:12:38,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156626931] [2021-06-05 14:12:38,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:12:38,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:12:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:12:38,858 INFO L87 Difference]: Start difference. First operand 8538 states and 34834 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:39,770 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2021-06-05 14:12:39,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:12:39,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:39,821 INFO L225 Difference]: With dead ends: 18926 [2021-06-05 14:12:39,822 INFO L226 Difference]: Without dead ends: 18926 [2021-06-05 14:12:39,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:12:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-06-05 14:12:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2021-06-05 14:12:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8688 states have (on average 4.058586556169429) internal successors, (35261), 8688 states have internal predecessors, (35261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2021-06-05 14:12:40,156 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2021-06-05 14:12:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:40,157 INFO L482 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2021-06-05 14:12:40,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2021-06-05 14:12:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:40,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:40,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:40,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 14:12:40,391 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash 407339324, now seen corresponding path program 13 times [2021-06-05 14:12:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:40,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41452428] [2021-06-05 14:12:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:40,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:40,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41452428] [2021-06-05 14:12:40,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41452428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:40,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971351380] [2021-06-05 14:12:40,440 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:40,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:40,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971351380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:40,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:40,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:12:40,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202878500] [2021-06-05 14:12:40,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:12:40,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:40,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:12:40,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:12:40,551 INFO L87 Difference]: Start difference. First operand 8689 states and 35261 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-06-05 14:12:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:41,281 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2021-06-05 14:12:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:12:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 28 [2021-06-05 14:12:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:41,314 INFO L225 Difference]: With dead ends: 12612 [2021-06-05 14:12:41,314 INFO L226 Difference]: Without dead ends: 12556 [2021-06-05 14:12:41,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:12:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2021-06-05 14:12:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2021-06-05 14:12:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.050397275822928) internal successors, (35684), 8810 states have internal predecessors, (35684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2021-06-05 14:12:41,677 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2021-06-05 14:12:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:41,677 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2021-06-05 14:12:41,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-06-05 14:12:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2021-06-05 14:12:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:41,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:41,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:41,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:41,926 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:41,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1488851502, now seen corresponding path program 14 times [2021-06-05 14:12:41,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:41,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565055276] [2021-06-05 14:12:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:42,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:42,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565055276] [2021-06-05 14:12:42,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565055276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:42,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705212333] [2021-06-05 14:12:42,253 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:42,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:42,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:42,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:42,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705212333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:42,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:42,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:12:42,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340574762] [2021-06-05 14:12:42,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:12:42,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:12:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:12:42,427 INFO L87 Difference]: Start difference. First operand 8811 states and 35684 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:43,107 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2021-06-05 14:12:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:12:43,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:43,152 INFO L225 Difference]: With dead ends: 16530 [2021-06-05 14:12:43,153 INFO L226 Difference]: Without dead ends: 16530 [2021-06-05 14:12:43,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:12:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-06-05 14:12:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2021-06-05 14:12:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.044381384790011) internal successors, (35631), 8810 states have internal predecessors, (35631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2021-06-05 14:12:43,553 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2021-06-05 14:12:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:43,553 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2021-06-05 14:12:43,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2021-06-05 14:12:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:43,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:43,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:43,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 14:12:43,785 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1081955579, now seen corresponding path program 15 times [2021-06-05 14:12:43,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:43,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161881069] [2021-06-05 14:12:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:43,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:43,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161881069] [2021-06-05 14:12:43,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161881069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:43,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674874659] [2021-06-05 14:12:43,837 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:12:43,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:12:43,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:44,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674874659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:44,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:44,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:12:44,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948264209] [2021-06-05 14:12:44,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:12:44,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:44,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:12:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:12:44,010 INFO L87 Difference]: Start difference. First operand 8811 states and 35631 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 14:12:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:44,372 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2021-06-05 14:12:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:12:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) Word has length 28 [2021-06-05 14:12:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:44,525 INFO L225 Difference]: With dead ends: 11652 [2021-06-05 14:12:44,525 INFO L226 Difference]: Without dead ends: 11632 [2021-06-05 14:12:44,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:12:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2021-06-05 14:12:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2021-06-05 14:12:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.043246311010216) internal successors, (35621), 8810 states have internal predecessors, (35621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2021-06-05 14:12:44,701 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2021-06-05 14:12:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:44,703 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2021-06-05 14:12:44,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 14:12:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2021-06-05 14:12:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:44,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:44,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:44,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 14:12:44,919 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2054099383, now seen corresponding path program 16 times [2021-06-05 14:12:44,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:44,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864655418] [2021-06-05 14:12:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:44,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:44,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864655418] [2021-06-05 14:12:44,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864655418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:44,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628850314] [2021-06-05 14:12:44,954 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:44,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:44,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:44,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:44,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:45,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628850314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:45,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:45,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:12:45,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080430004] [2021-06-05 14:12:45,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:12:45,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:45,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:12:45,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:12:45,115 INFO L87 Difference]: Start difference. First operand 8811 states and 35621 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:45,638 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2021-06-05 14:12:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:12:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 28 [2021-06-05 14:12:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:45,673 INFO L225 Difference]: With dead ends: 13573 [2021-06-05 14:12:45,673 INFO L226 Difference]: Without dead ends: 13573 [2021-06-05 14:12:45,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:12:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2021-06-05 14:12:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2021-06-05 14:12:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.042423558614464) internal successors, (35828), 8863 states have internal predecessors, (35828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2021-06-05 14:12:45,874 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2021-06-05 14:12:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:45,874 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2021-06-05 14:12:45,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2021-06-05 14:12:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:45,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:45,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:46,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 14:12:46,105 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:46,105 INFO L82 PathProgramCache]: Analyzing trace with hash -490719258, now seen corresponding path program 17 times [2021-06-05 14:12:46,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:46,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784133471] [2021-06-05 14:12:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:46,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:46,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784133471] [2021-06-05 14:12:46,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784133471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:46,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658359987] [2021-06-05 14:12:46,139 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:46,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:12:46,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:46,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:46,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:46,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658359987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:46,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:46,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:12:46,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979486952] [2021-06-05 14:12:46,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:12:46,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:46,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:12:46,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:12:46,244 INFO L87 Difference]: Start difference. First operand 8864 states and 35828 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:46,734 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2021-06-05 14:12:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:12:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:46,772 INFO L225 Difference]: With dead ends: 14465 [2021-06-05 14:12:46,772 INFO L226 Difference]: Without dead ends: 14437 [2021-06-05 14:12:46,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:12:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2021-06-05 14:12:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2021-06-05 14:12:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.0412952724811015) internal successors, (35818), 8863 states have internal predecessors, (35818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2021-06-05 14:12:47,025 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2021-06-05 14:12:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:47,026 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2021-06-05 14:12:47,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2021-06-05 14:12:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:47,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:47,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:47,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 14:12:47,253 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1217287753, now seen corresponding path program 18 times [2021-06-05 14:12:47,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:47,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191561758] [2021-06-05 14:12:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:47,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:47,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191561758] [2021-06-05 14:12:47,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191561758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:47,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570063744] [2021-06-05 14:12:47,315 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:47,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:12:47,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:47,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:47,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:47,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570063744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:47,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:47,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:12:47,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694941440] [2021-06-05 14:12:47,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:47,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:47,422 INFO L87 Difference]: Start difference. First operand 8864 states and 35818 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:48,186 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2021-06-05 14:12:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:12:48,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 28 [2021-06-05 14:12:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:48,230 INFO L225 Difference]: With dead ends: 17059 [2021-06-05 14:12:48,231 INFO L226 Difference]: Without dead ends: 17059 [2021-06-05 14:12:48,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:12:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2021-06-05 14:12:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2021-06-05 14:12:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.040489008524002) internal successors, (36025), 8916 states have internal predecessors, (36025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2021-06-05 14:12:48,465 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2021-06-05 14:12:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:48,465 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2021-06-05 14:12:48,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2021-06-05 14:12:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:48,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:48,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:48,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:48,698 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash -857102546, now seen corresponding path program 19 times [2021-06-05 14:12:48,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:48,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429258166] [2021-06-05 14:12:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:48,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:48,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429258166] [2021-06-05 14:12:48,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429258166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:48,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298492354] [2021-06-05 14:12:48,725 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:48,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:48,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298492354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:48,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:48,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:12:48,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250027405] [2021-06-05 14:12:48,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:48,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:48,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:48,829 INFO L87 Difference]: Start difference. First operand 8917 states and 36025 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:49,448 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2021-06-05 14:12:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:12:49,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:49,492 INFO L225 Difference]: With dead ends: 17336 [2021-06-05 14:12:49,492 INFO L226 Difference]: Without dead ends: 17224 [2021-06-05 14:12:49,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:12:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2021-06-05 14:12:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2021-06-05 14:12:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.039367429340511) internal successors, (36015), 8916 states have internal predecessors, (36015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2021-06-05 14:12:49,740 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2021-06-05 14:12:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:49,740 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2021-06-05 14:12:49,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2021-06-05 14:12:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:49,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:49,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:49,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:49,969 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1623161651, now seen corresponding path program 20 times [2021-06-05 14:12:49,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:49,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834967459] [2021-06-05 14:12:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:50,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:50,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834967459] [2021-06-05 14:12:50,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834967459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:50,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618613227] [2021-06-05 14:12:50,020 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:50,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:50,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:50,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:50,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618613227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:50,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:50,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:12:50,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738097322] [2021-06-05 14:12:50,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:50,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:50,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:50,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:50,142 INFO L87 Difference]: Start difference. First operand 8917 states and 36015 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:50,926 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2021-06-05 14:12:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:12:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:50,960 INFO L225 Difference]: With dead ends: 13676 [2021-06-05 14:12:50,960 INFO L226 Difference]: Without dead ends: 13676 [2021-06-05 14:12:50,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:12:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2021-06-05 14:12:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2021-06-05 14:12:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 4.022562979189485) internal successors, (36726), 9130 states have internal predecessors, (36726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2021-06-05 14:12:51,158 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2021-06-05 14:12:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:51,158 INFO L482 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2021-06-05 14:12:51,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2021-06-05 14:12:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:51,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:51,174 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:51,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 14:12:51,374 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash -331624474, now seen corresponding path program 21 times [2021-06-05 14:12:51,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:51,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897141638] [2021-06-05 14:12:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:51,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:51,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897141638] [2021-06-05 14:12:51,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897141638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:51,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318760939] [2021-06-05 14:12:51,414 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:51,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:12:51,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:51,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318760939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:51,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:51,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:12:51,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573764599] [2021-06-05 14:12:51,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:51,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:51,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:51,536 INFO L87 Difference]: Start difference. First operand 9131 states and 36726 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:52,057 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2021-06-05 14:12:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:12:52,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:52,094 INFO L225 Difference]: With dead ends: 15155 [2021-06-05 14:12:52,094 INFO L226 Difference]: Without dead ends: 15043 [2021-06-05 14:12:52,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:12:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2021-06-05 14:12:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2021-06-05 14:12:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 4.008238818745988) internal successors, (37461), 9346 states have internal predecessors, (37461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2021-06-05 14:12:52,354 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2021-06-05 14:12:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:52,355 INFO L482 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2021-06-05 14:12:52,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2021-06-05 14:12:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:52,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:52,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:52,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:52,573 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1738838736, now seen corresponding path program 22 times [2021-06-05 14:12:52,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:52,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336985832] [2021-06-05 14:12:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:52,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:52,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336985832] [2021-06-05 14:12:52,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336985832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:52,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909785912] [2021-06-05 14:12:52,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:52,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:52,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:52,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:52,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909785912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:52,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:52,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:12:52,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643057795] [2021-06-05 14:12:52,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:12:52,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:52,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:12:52,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:12:52,708 INFO L87 Difference]: Start difference. First operand 9347 states and 37461 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:53,385 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2021-06-05 14:12:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:12:53,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:53,425 INFO L225 Difference]: With dead ends: 16354 [2021-06-05 14:12:53,426 INFO L226 Difference]: Without dead ends: 16354 [2021-06-05 14:12:53,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:12:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2021-06-05 14:12:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2021-06-05 14:12:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9240 states have (on average 3.997943722943723) internal successors, (36941), 9240 states have internal predecessors, (36941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2021-06-05 14:12:53,780 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2021-06-05 14:12:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:53,780 INFO L482 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2021-06-05 14:12:53,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2021-06-05 14:12:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:53,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:53,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:54,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 14:12:54,017 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:54,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1444912965, now seen corresponding path program 23 times [2021-06-05 14:12:54,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:54,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428874746] [2021-06-05 14:12:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:54,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428874746] [2021-06-05 14:12:54,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428874746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156887686] [2021-06-05 14:12:54,045 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:54,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:54,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:54,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156887686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:54,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:54,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:12:54,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142028125] [2021-06-05 14:12:54,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:12:54,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:12:54,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:12:54,202 INFO L87 Difference]: Start difference. First operand 9241 states and 36941 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:54,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:54,700 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2021-06-05 14:12:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:12:54,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:54,730 INFO L225 Difference]: With dead ends: 12762 [2021-06-05 14:12:54,731 INFO L226 Difference]: Without dead ends: 12722 [2021-06-05 14:12:54,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:12:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2021-06-05 14:12:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2021-06-05 14:12:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 4.0035626809173905) internal successors, (35960), 8982 states have internal predecessors, (35960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2021-06-05 14:12:54,919 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2021-06-05 14:12:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:54,919 INFO L482 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2021-06-05 14:12:54,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2021-06-05 14:12:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:54,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:54,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:55,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 14:12:55,136 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1089598035, now seen corresponding path program 4 times [2021-06-05 14:12:55,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:55,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270732146] [2021-06-05 14:12:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:55,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:55,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270732146] [2021-06-05 14:12:55,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270732146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:55,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866796996] [2021-06-05 14:12:55,171 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:55,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:55,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:55,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866796996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:55,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:55,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:12:55,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976524890] [2021-06-05 14:12:55,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:55,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:55,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:55,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:55,260 INFO L87 Difference]: Start difference. First operand 8983 states and 35960 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:56,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:56,077 INFO L93 Difference]: Finished difference Result 30234 states and 120265 transitions. [2021-06-05 14:12:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:12:56,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:56,173 INFO L225 Difference]: With dead ends: 30234 [2021-06-05 14:12:56,173 INFO L226 Difference]: Without dead ends: 30234 [2021-06-05 14:12:56,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:12:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30234 states. [2021-06-05 14:12:56,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30234 to 14412. [2021-06-05 14:12:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14411 states have (on average 4.099715495107904) internal successors, (59081), 14411 states have internal predecessors, (59081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2021-06-05 14:12:56,623 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2021-06-05 14:12:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:56,623 INFO L482 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2021-06-05 14:12:56,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2021-06-05 14:12:56,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:56,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:56,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:56,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 14:12:56,871 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash 473096940, now seen corresponding path program 5 times [2021-06-05 14:12:56,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:56,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503494855] [2021-06-05 14:12:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:56,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503494855] [2021-06-05 14:12:56,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503494855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995354300] [2021-06-05 14:12:56,903 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:56,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:12:56,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:57,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995354300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:57,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:57,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:12:57,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020224695] [2021-06-05 14:12:57,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:12:57,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:57,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:12:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:12:57,009 INFO L87 Difference]: Start difference. First operand 14412 states and 59081 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:57,818 INFO L93 Difference]: Finished difference Result 40819 states and 161536 transitions. [2021-06-05 14:12:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:12:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:57,946 INFO L225 Difference]: With dead ends: 40819 [2021-06-05 14:12:57,946 INFO L226 Difference]: Without dead ends: 40578 [2021-06-05 14:12:57,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:12:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40578 states. [2021-06-05 14:12:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40578 to 24036. [2021-06-05 14:12:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.249511129602663) internal successors, (102137), 24035 states have internal predecessors, (102137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 102137 transitions. [2021-06-05 14:12:58,740 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 102137 transitions. Word has length 28 [2021-06-05 14:12:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:58,741 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 102137 transitions. [2021-06-05 14:12:58,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:12:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 102137 transitions. [2021-06-05 14:12:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:12:58,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:58,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:59,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 14:12:59,017 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1472081004, now seen corresponding path program 6 times [2021-06-05 14:12:59,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:59,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012427612] [2021-06-05 14:12:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:59,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:59,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012427612] [2021-06-05 14:12:59,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012427612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290659729] [2021-06-05 14:12:59,064 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:59,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:12:59,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:59,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:12:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:59,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290659729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:59,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:59,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:12:59,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879951567] [2021-06-05 14:12:59,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:12:59,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:59,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:12:59,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:12:59,179 INFO L87 Difference]: Start difference. First operand 24036 states and 102137 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:59,771 INFO L93 Difference]: Finished difference Result 42953 states and 171667 transitions. [2021-06-05 14:12:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:12:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:12:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:59,919 INFO L225 Difference]: With dead ends: 42953 [2021-06-05 14:12:59,919 INFO L226 Difference]: Without dead ends: 42953 [2021-06-05 14:12:59,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:13:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42953 states. [2021-06-05 14:13:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42953 to 24036. [2021-06-05 14:13:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.228292074058665) internal successors, (101627), 24035 states have internal predecessors, (101627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 101627 transitions. [2021-06-05 14:13:00,886 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 101627 transitions. Word has length 28 [2021-06-05 14:13:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:00,886 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 101627 transitions. [2021-06-05 14:13:00,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 101627 transitions. [2021-06-05 14:13:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:00,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:00,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:01,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 14:13:01,161 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:01,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1500245315, now seen corresponding path program 7 times [2021-06-05 14:13:01,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:01,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166020760] [2021-06-05 14:13:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:01,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166020760] [2021-06-05 14:13:01,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166020760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:01,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664197231] [2021-06-05 14:13:01,383 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:01,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:01,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:01,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664197231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:01,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:01,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:13:01,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118234834] [2021-06-05 14:13:01,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:13:01,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:01,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:13:01,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:13:01,526 INFO L87 Difference]: Start difference. First operand 24036 states and 101627 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 14:13:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:02,658 INFO L93 Difference]: Finished difference Result 29179 states and 119232 transitions. [2021-06-05 14:13:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:13:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) Word has length 28 [2021-06-05 14:13:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:02,755 INFO L225 Difference]: With dead ends: 29179 [2021-06-05 14:13:02,755 INFO L226 Difference]: Without dead ends: 29131 [2021-06-05 14:13:02,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:13:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29131 states. [2021-06-05 14:13:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29131 to 24202. [2021-06-05 14:13:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24202 states, 24201 states have (on average 4.223296557993471) internal successors, (102208), 24201 states have internal predecessors, (102208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24202 states to 24202 states and 102208 transitions. [2021-06-05 14:13:03,533 INFO L78 Accepts]: Start accepts. Automaton has 24202 states and 102208 transitions. Word has length 28 [2021-06-05 14:13:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:03,533 INFO L482 AbstractCegarLoop]: Abstraction has 24202 states and 102208 transitions. [2021-06-05 14:13:03,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 14:13:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24202 states and 102208 transitions. [2021-06-05 14:13:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:03,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:03,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:03,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:03,810 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1268278573, now seen corresponding path program 8 times [2021-06-05 14:13:03,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:03,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531740935] [2021-06-05 14:13:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:03,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:03,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531740935] [2021-06-05 14:13:03,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531740935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:03,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952850111] [2021-06-05 14:13:03,846 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:03,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:13:03,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:03,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:03,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:04,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952850111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:04,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:04,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 14:13:04,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990229533] [2021-06-05 14:13:04,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:13:04,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:04,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:13:04,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:13:04,021 INFO L87 Difference]: Start difference. First operand 24202 states and 102208 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-06-05 14:13:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:04,872 INFO L93 Difference]: Finished difference Result 49310 states and 196485 transitions. [2021-06-05 14:13:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:13:04,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 28 [2021-06-05 14:13:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:05,048 INFO L225 Difference]: With dead ends: 49310 [2021-06-05 14:13:05,048 INFO L226 Difference]: Without dead ends: 49310 [2021-06-05 14:13:05,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:13:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49310 states. [2021-06-05 14:13:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49310 to 24542. [2021-06-05 14:13:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.213683223992502) internal successors, (103408), 24541 states have internal predecessors, (103408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103408 transitions. [2021-06-05 14:13:05,968 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103408 transitions. Word has length 28 [2021-06-05 14:13:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:05,969 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103408 transitions. [2021-06-05 14:13:05,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-06-05 14:13:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103408 transitions. [2021-06-05 14:13:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:06,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:06,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:06,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 14:13:06,230 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash 559591502, now seen corresponding path program 9 times [2021-06-05 14:13:06,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:06,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304829707] [2021-06-05 14:13:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:06,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:06,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304829707] [2021-06-05 14:13:06,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304829707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:06,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331978989] [2021-06-05 14:13:06,271 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:06,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:13:06,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:06,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:06,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:06,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331978989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:06,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:06,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 14:13:06,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254735257] [2021-06-05 14:13:06,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:13:06,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:06,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:13:06,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:13:06,400 INFO L87 Difference]: Start difference. First operand 24542 states and 103408 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:07,142 INFO L93 Difference]: Finished difference Result 43190 states and 171488 transitions. [2021-06-05 14:13:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:13:07,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 28 [2021-06-05 14:13:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:07,270 INFO L225 Difference]: With dead ends: 43190 [2021-06-05 14:13:07,270 INFO L226 Difference]: Without dead ends: 43115 [2021-06-05 14:13:07,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:13:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43115 states. [2021-06-05 14:13:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43115 to 24542. [2021-06-05 14:13:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.212705268733956) internal successors, (103384), 24541 states have internal predecessors, (103384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103384 transitions. [2021-06-05 14:13:08,155 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103384 transitions. Word has length 28 [2021-06-05 14:13:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:08,159 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103384 transitions. [2021-06-05 14:13:08,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103384 transitions. [2021-06-05 14:13:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:08,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:08,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:08,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 14:13:08,433 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash -402212590, now seen corresponding path program 10 times [2021-06-05 14:13:08,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:08,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141379218] [2021-06-05 14:13:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:08,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:08,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141379218] [2021-06-05 14:13:08,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141379218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:08,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474756101] [2021-06-05 14:13:08,496 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:08,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:13:08,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:08,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:08,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:08,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474756101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:08,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:08,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 14:13:08,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393701854] [2021-06-05 14:13:08,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:13:08,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:08,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:13:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:13:08,661 INFO L87 Difference]: Start difference. First operand 24542 states and 103384 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 14:13:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:09,785 INFO L93 Difference]: Finished difference Result 51588 states and 205543 transitions. [2021-06-05 14:13:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:13:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) Word has length 28 [2021-06-05 14:13:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:09,972 INFO L225 Difference]: With dead ends: 51588 [2021-06-05 14:13:09,972 INFO L226 Difference]: Without dead ends: 51588 [2021-06-05 14:13:09,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:13:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51588 states. [2021-06-05 14:13:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51588 to 24882. [2021-06-05 14:13:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.210200554640087) internal successors, (104754), 24881 states have internal predecessors, (104754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104754 transitions. [2021-06-05 14:13:10,905 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104754 transitions. Word has length 28 [2021-06-05 14:13:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:10,905 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104754 transitions. [2021-06-05 14:13:10,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 14:13:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104754 transitions. [2021-06-05 14:13:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:10,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:10,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:11,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:11,182 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash -374048279, now seen corresponding path program 11 times [2021-06-05 14:13:11,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:11,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275600954] [2021-06-05 14:13:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:11,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275600954] [2021-06-05 14:13:11,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275600954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149674844] [2021-06-05 14:13:11,228 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:11,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:13:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:11,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149674844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:11,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:11,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 14:13:11,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667923136] [2021-06-05 14:13:11,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:13:11,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:13:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:13:11,363 INFO L87 Difference]: Start difference. First operand 24882 states and 104754 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:12,000 INFO L93 Difference]: Finished difference Result 39744 states and 158044 transitions. [2021-06-05 14:13:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:13:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 28 [2021-06-05 14:13:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:12,116 INFO L225 Difference]: With dead ends: 39744 [2021-06-05 14:13:12,116 INFO L226 Difference]: Without dead ends: 39696 [2021-06-05 14:13:12,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:13:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39696 states. [2021-06-05 14:13:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39696 to 24882. [2021-06-05 14:13:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.209235963184759) internal successors, (104730), 24881 states have internal predecessors, (104730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104730 transitions. [2021-06-05 14:13:12,844 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104730 transitions. Word has length 28 [2021-06-05 14:13:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:12,844 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104730 transitions. [2021-06-05 14:13:12,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104730 transitions. [2021-06-05 14:13:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:12,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:12,908 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:13,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 14:13:13,125 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:13,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1874668720, now seen corresponding path program 12 times [2021-06-05 14:13:13,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:13,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391210310] [2021-06-05 14:13:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:13,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:13,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391210310] [2021-06-05 14:13:13,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391210310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:13,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179207865] [2021-06-05 14:13:13,163 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:13,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:13:13,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:13,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:13,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:13,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179207865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:13,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:13,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:13:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189901867] [2021-06-05 14:13:13,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:13:13,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:13:13,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:13:13,282 INFO L87 Difference]: Start difference. First operand 24882 states and 104730 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-06-05 14:13:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:14,176 INFO L93 Difference]: Finished difference Result 51567 states and 205376 transitions. [2021-06-05 14:13:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:13:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) Word has length 28 [2021-06-05 14:13:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:14,351 INFO L225 Difference]: With dead ends: 51567 [2021-06-05 14:13:14,351 INFO L226 Difference]: Without dead ends: 51567 [2021-06-05 14:13:14,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:13:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51567 states. [2021-06-05 14:13:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51567 to 25308. [2021-06-05 14:13:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25308 states, 25307 states have (on average 4.182123523135891) internal successors, (105837), 25307 states have internal predecessors, (105837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25308 states to 25308 states and 105837 transitions. [2021-06-05 14:13:15,295 INFO L78 Accepts]: Start accepts. Automaton has 25308 states and 105837 transitions. Word has length 28 [2021-06-05 14:13:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:15,296 INFO L482 AbstractCegarLoop]: Abstraction has 25308 states and 105837 transitions. [2021-06-05 14:13:15,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-06-05 14:13:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 25308 states and 105837 transitions. [2021-06-05 14:13:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:15,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:15,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:15,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:15,573 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:15,573 INFO L82 PathProgramCache]: Analyzing trace with hash -652745811, now seen corresponding path program 13 times [2021-06-05 14:13:15,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:15,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237206640] [2021-06-05 14:13:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:15,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237206640] [2021-06-05 14:13:15,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237206640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609956245] [2021-06-05 14:13:15,632 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:15,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:16,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609956245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:16,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:16,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:13:16,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460035222] [2021-06-05 14:13:16,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:13:16,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:16,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:13:16,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:13:16,362 INFO L87 Difference]: Start difference. First operand 25308 states and 105837 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:17,481 INFO L93 Difference]: Finished difference Result 35545 states and 141251 transitions. [2021-06-05 14:13:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:13:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:13:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:17,590 INFO L225 Difference]: With dead ends: 35545 [2021-06-05 14:13:17,590 INFO L226 Difference]: Without dead ends: 35497 [2021-06-05 14:13:17,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 675.0ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:13:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2021-06-05 14:13:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 25624. [2021-06-05 14:13:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.173633064044023) internal successors, (106941), 25623 states have internal predecessors, (106941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106941 transitions. [2021-06-05 14:13:18,311 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106941 transitions. Word has length 28 [2021-06-05 14:13:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:18,311 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106941 transitions. [2021-06-05 14:13:18,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106941 transitions. [2021-06-05 14:13:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:18,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:18,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:18,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 14:13:18,589 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:18,589 INFO L82 PathProgramCache]: Analyzing trace with hash -229548541, now seen corresponding path program 14 times [2021-06-05 14:13:18,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:18,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982976374] [2021-06-05 14:13:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:18,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:18,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982976374] [2021-06-05 14:13:18,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982976374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:18,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232498296] [2021-06-05 14:13:18,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:18,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:13:18,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:18,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:18,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:18,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232498296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:18,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:18,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:13:18,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988057252] [2021-06-05 14:13:18,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:13:18,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:13:18,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:13:18,780 INFO L87 Difference]: Start difference. First operand 25624 states and 106941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-06-05 14:13:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:20,070 INFO L93 Difference]: Finished difference Result 46151 states and 182270 transitions. [2021-06-05 14:13:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:13:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 28 [2021-06-05 14:13:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:20,211 INFO L225 Difference]: With dead ends: 46151 [2021-06-05 14:13:20,211 INFO L226 Difference]: Without dead ends: 46151 [2021-06-05 14:13:20,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:13:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46151 states. [2021-06-05 14:13:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46151 to 25624. [2021-06-05 14:13:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166998399875112) internal successors, (106771), 25623 states have internal predecessors, (106771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106771 transitions. [2021-06-05 14:13:21,026 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106771 transitions. Word has length 28 [2021-06-05 14:13:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:21,026 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106771 transitions. [2021-06-05 14:13:21,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-06-05 14:13:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106771 transitions. [2021-06-05 14:13:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:21,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:21,091 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:21,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 14:13:21,304 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:21,305 INFO L82 PathProgramCache]: Analyzing trace with hash -938235612, now seen corresponding path program 15 times [2021-06-05 14:13:21,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:21,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084325626] [2021-06-05 14:13:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:21,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:21,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084325626] [2021-06-05 14:13:21,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084325626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:21,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416513174] [2021-06-05 14:13:21,332 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:21,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:13:21,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:21,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:21,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416513174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:21,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:21,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:13:21,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746069928] [2021-06-05 14:13:21,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:13:21,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:21,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:13:21,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:13:21,449 INFO L87 Difference]: Start difference. First operand 25624 states and 106771 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 14:13:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:21,890 INFO L93 Difference]: Finished difference Result 32707 states and 131617 transitions. [2021-06-05 14:13:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:13:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) Word has length 28 [2021-06-05 14:13:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:21,987 INFO L225 Difference]: With dead ends: 32707 [2021-06-05 14:13:21,987 INFO L226 Difference]: Without dead ends: 32682 [2021-06-05 14:13:21,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:13:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32682 states. [2021-06-05 14:13:22,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32682 to 25624. [2021-06-05 14:13:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166530070639659) internal successors, (106759), 25623 states have internal predecessors, (106759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106759 transitions. [2021-06-05 14:13:22,974 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106759 transitions. Word has length 28 [2021-06-05 14:13:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:22,975 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106759 transitions. [2021-06-05 14:13:22,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 14:13:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106759 transitions. [2021-06-05 14:13:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:23,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:23,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:23,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 14:13:23,259 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:23,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1900039704, now seen corresponding path program 16 times [2021-06-05 14:13:23,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:23,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163356274] [2021-06-05 14:13:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:23,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:23,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163356274] [2021-06-05 14:13:23,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163356274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:23,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529793833] [2021-06-05 14:13:23,305 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:13:23,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:13:23,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:23,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:23,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529793833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:23,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:23,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:13:23,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223418682] [2021-06-05 14:13:23,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:13:23,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:13:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:13:23,436 INFO L87 Difference]: Start difference. First operand 25624 states and 106759 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:24,011 INFO L93 Difference]: Finished difference Result 38112 states and 153561 transitions. [2021-06-05 14:13:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:13:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:13:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:24,119 INFO L225 Difference]: With dead ends: 38112 [2021-06-05 14:13:24,119 INFO L226 Difference]: Without dead ends: 38112 [2021-06-05 14:13:24,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:13:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38112 states. [2021-06-05 14:13:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38112 to 25794. [2021-06-05 14:13:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.1656263327259335) internal successors, (107444), 25793 states have internal predecessors, (107444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107444 transitions. [2021-06-05 14:13:25,135 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107444 transitions. Word has length 28 [2021-06-05 14:13:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:25,135 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107444 transitions. [2021-06-05 14:13:25,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107444 transitions. [2021-06-05 14:13:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:25,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:25,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:25,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 14:13:25,590 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:25,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:25,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1871875393, now seen corresponding path program 17 times [2021-06-05 14:13:25,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:25,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685693352] [2021-06-05 14:13:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:25,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:25,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685693352] [2021-06-05 14:13:25,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685693352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:25,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733181243] [2021-06-05 14:13:25,628 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:25,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:13:25,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:25,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:25,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733181243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:25,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:25,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 14:13:25,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007960674] [2021-06-05 14:13:25,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:13:25,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:25,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:13:25,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:13:25,737 INFO L87 Difference]: Start difference. First operand 25794 states and 107444 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 14:13:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:26,270 INFO L93 Difference]: Finished difference Result 39804 states and 156168 transitions. [2021-06-05 14:13:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:13:26,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) Word has length 28 [2021-06-05 14:13:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:26,392 INFO L225 Difference]: With dead ends: 39804 [2021-06-05 14:13:26,392 INFO L226 Difference]: Without dead ends: 39780 [2021-06-05 14:13:26,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:13:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39780 states. [2021-06-05 14:13:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39780 to 25794. [2021-06-05 14:13:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.165161090218276) internal successors, (107432), 25793 states have internal predecessors, (107432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107432 transitions. [2021-06-05 14:13:27,595 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107432 transitions. Word has length 28 [2021-06-05 14:13:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:27,595 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107432 transitions. [2021-06-05 14:13:27,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-05 14:13:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107432 transitions. [2021-06-05 14:13:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:27,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:27,662 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:27,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:27,863 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 376841606, now seen corresponding path program 18 times [2021-06-05 14:13:27,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:27,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113074125] [2021-06-05 14:13:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:27,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113074125] [2021-06-05 14:13:27,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113074125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308858315] [2021-06-05 14:13:27,905 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:27,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:13:27,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:27,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:28,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308858315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:28,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:28,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:13:28,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021749070] [2021-06-05 14:13:28,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:13:28,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:13:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:13:28,021 INFO L87 Difference]: Start difference. First operand 25794 states and 107432 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:29,150 INFO L93 Difference]: Finished difference Result 48289 states and 195910 transitions. [2021-06-05 14:13:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:13:29,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:13:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:29,302 INFO L225 Difference]: With dead ends: 48289 [2021-06-05 14:13:29,303 INFO L226 Difference]: Without dead ends: 48289 [2021-06-05 14:13:29,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:13:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48289 states. [2021-06-05 14:13:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48289 to 25964. [2021-06-05 14:13:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.164272233563148) internal successors, (108117), 25963 states have internal predecessors, (108117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108117 transitions. [2021-06-05 14:13:30,237 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108117 transitions. Word has length 28 [2021-06-05 14:13:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:30,237 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108117 transitions. [2021-06-05 14:13:30,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108117 transitions. [2021-06-05 14:13:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:30,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:30,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:30,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 14:13:30,513 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394371, now seen corresponding path program 19 times [2021-06-05 14:13:30,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:30,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703782601] [2021-06-05 14:13:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:30,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703782601] [2021-06-05 14:13:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703782601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140005672] [2021-06-05 14:13:30,570 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:30,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140005672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:30,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:30,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:13:30,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895351547] [2021-06-05 14:13:30,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:13:30,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:30,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:13:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:13:30,695 INFO L87 Difference]: Start difference. First operand 25964 states and 108117 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 14:13:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:31,660 INFO L93 Difference]: Finished difference Result 47194 states and 183148 transitions. [2021-06-05 14:13:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:13:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) Word has length 28 [2021-06-05 14:13:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:31,797 INFO L225 Difference]: With dead ends: 47194 [2021-06-05 14:13:31,797 INFO L226 Difference]: Without dead ends: 47098 [2021-06-05 14:13:31,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:13:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47098 states. [2021-06-05 14:13:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47098 to 25964. [2021-06-05 14:13:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.16381003736086) internal successors, (108105), 25963 states have internal predecessors, (108105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108105 transitions. [2021-06-05 14:13:32,952 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108105 transitions. Word has length 28 [2021-06-05 14:13:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:32,952 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108105 transitions. [2021-06-05 14:13:32,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-05 14:13:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108105 transitions. [2021-06-05 14:13:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:33,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:33,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:33,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:33,217 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1673405932, now seen corresponding path program 20 times [2021-06-05 14:13:33,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:33,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445728059] [2021-06-05 14:13:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:33,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:33,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445728059] [2021-06-05 14:13:33,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445728059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:33,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849771562] [2021-06-05 14:13:33,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:33,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:13:33,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:33,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:33,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:33,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849771562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:33,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:33,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:13:33,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736615055] [2021-06-05 14:13:33,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:13:33,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:13:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:13:33,334 INFO L87 Difference]: Start difference. First operand 25964 states and 108105 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:13:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:34,342 INFO L93 Difference]: Finished difference Result 38914 states and 158503 transitions. [2021-06-05 14:13:34,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:13:34,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:13:34,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:34,460 INFO L225 Difference]: With dead ends: 38914 [2021-06-05 14:13:34,460 INFO L226 Difference]: Without dead ends: 38914 [2021-06-05 14:13:34,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:13:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38914 states. [2021-06-05 14:13:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38914 to 26620. [2021-06-05 14:13:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26620 states, 26619 states have (on average 4.1402381757391336) internal successors, (110209), 26619 states have internal predecessors, (110209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26620 states to 26620 states and 110209 transitions. [2021-06-05 14:13:35,219 INFO L78 Accepts]: Start accepts. Automaton has 26620 states and 110209 transitions. Word has length 28 [2021-06-05 14:13:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:35,219 INFO L482 AbstractCegarLoop]: Abstraction has 26620 states and 110209 transitions. [2021-06-05 14:13:35,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:13:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 26620 states and 110209 transitions. [2021-06-05 14:13:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:35,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:35,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:35,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:35,481 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1786221247, now seen corresponding path program 21 times [2021-06-05 14:13:35,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:35,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569198686] [2021-06-05 14:13:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:35,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:35,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569198686] [2021-06-05 14:13:35,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569198686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:35,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742609340] [2021-06-05 14:13:35,538 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:35,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:13:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:35,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:35,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742609340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:35,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:35,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:13:35,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483093070] [2021-06-05 14:13:35,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:13:35,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:13:35,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:13:35,640 INFO L87 Difference]: Start difference. First operand 26620 states and 110209 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:13:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:36,424 INFO L93 Difference]: Finished difference Result 41610 states and 161108 transitions. [2021-06-05 14:13:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:13:36,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:13:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:36,530 INFO L225 Difference]: With dead ends: 41610 [2021-06-05 14:13:36,530 INFO L226 Difference]: Without dead ends: 41514 [2021-06-05 14:13:36,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:13:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41514 states. [2021-06-05 14:13:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41514 to 27244. [2021-06-05 14:13:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27244 states, 27243 states have (on average 4.125646955181147) internal successors, (112395), 27243 states have internal predecessors, (112395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 112395 transitions. [2021-06-05 14:13:37,339 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 112395 transitions. Word has length 28 [2021-06-05 14:13:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:37,340 INFO L482 AbstractCegarLoop]: Abstraction has 27244 states and 112395 transitions. [2021-06-05 14:13:37,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-06-05 14:13:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 112395 transitions. [2021-06-05 14:13:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:37,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:37,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:37,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 14:13:37,619 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash -703123463, now seen corresponding path program 22 times [2021-06-05 14:13:37,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:37,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125910807] [2021-06-05 14:13:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:37,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125910807] [2021-06-05 14:13:37,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125910807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985873447] [2021-06-05 14:13:37,652 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:37,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:13:37,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:37,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:37,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:37,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985873447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:37,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:37,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:13:37,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691794660] [2021-06-05 14:13:37,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:13:37,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:37,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:13:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:13:37,762 INFO L87 Difference]: Start difference. First operand 27244 states and 112395 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-06-05 14:13:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:38,895 INFO L93 Difference]: Finished difference Result 48209 states and 191672 transitions. [2021-06-05 14:13:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:13:38,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 28 [2021-06-05 14:13:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:39,055 INFO L225 Difference]: With dead ends: 48209 [2021-06-05 14:13:39,060 INFO L226 Difference]: Without dead ends: 48209 [2021-06-05 14:13:39,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:13:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48209 states. [2021-06-05 14:13:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48209 to 26904. [2021-06-05 14:13:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 26903 states have (on average 4.114225179348028) internal successors, (110685), 26903 states have internal predecessors, (110685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 110685 transitions. [2021-06-05 14:13:40,497 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 110685 transitions. Word has length 28 [2021-06-05 14:13:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:40,497 INFO L482 AbstractCegarLoop]: Abstraction has 26904 states and 110685 transitions. [2021-06-05 14:13:40,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-06-05 14:13:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 110685 transitions. [2021-06-05 14:13:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:13:40,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:40,590 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:40,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:40,805 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash 865070776, now seen corresponding path program 23 times [2021-06-05 14:13:40,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:40,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642210073] [2021-06-05 14:13:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:40,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642210073] [2021-06-05 14:13:40,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642210073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067982129] [2021-06-05 14:13:40,839 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:40,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:13:40,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:40,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:13:40,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:41,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067982129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:41,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:41,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:13:41,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464832628] [2021-06-05 14:13:41,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:13:41,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:13:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:13:41,007 INFO L87 Difference]: Start difference. First operand 26904 states and 110685 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:41,630 INFO L93 Difference]: Finished difference Result 35478 states and 139558 transitions. [2021-06-05 14:13:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:13:41,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 14:13:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:41,735 INFO L225 Difference]: With dead ends: 35478 [2021-06-05 14:13:41,735 INFO L226 Difference]: Without dead ends: 35428 [2021-06-05 14:13:41,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:13:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35428 states. [2021-06-05 14:13:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35428 to 26239. [2021-06-05 14:13:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26239 states, 26238 states have (on average 4.115595700891836) internal successors, (107985), 26238 states have internal predecessors, (107985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26239 states to 26239 states and 107985 transitions. [2021-06-05 14:13:42,556 INFO L78 Accepts]: Start accepts. Automaton has 26239 states and 107985 transitions. Word has length 28 [2021-06-05 14:13:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:42,557 INFO L482 AbstractCegarLoop]: Abstraction has 26239 states and 107985 transitions. [2021-06-05 14:13:42,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 26239 states and 107985 transitions. [2021-06-05 14:13:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:13:42,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:42,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:42,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 14:13:42,829 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:42,829 INFO L82 PathProgramCache]: Analyzing trace with hash 245948648, now seen corresponding path program 24 times [2021-06-05 14:13:42,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:42,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234621498] [2021-06-05 14:13:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:42,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:42,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234621498] [2021-06-05 14:13:42,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234621498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:42,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186982345] [2021-06-05 14:13:42,932 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:43,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:13:43,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:43,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:13:43,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:43,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186982345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:43,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:43,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-06-05 14:13:43,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981039617] [2021-06-05 14:13:43,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:13:43,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:43,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:13:43,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:13:43,515 INFO L87 Difference]: Start difference. First operand 26239 states and 107985 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:44,404 INFO L93 Difference]: Finished difference Result 29258 states and 119012 transitions. [2021-06-05 14:13:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:13:44,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 14:13:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:44,501 INFO L225 Difference]: With dead ends: 29258 [2021-06-05 14:13:44,501 INFO L226 Difference]: Without dead ends: 29122 [2021-06-05 14:13:44,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:13:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-06-05 14:13:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 26985. [2021-06-05 14:13:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26985 states, 26984 states have (on average 4.111139934776164) internal successors, (110935), 26984 states have internal predecessors, (110935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26985 states to 26985 states and 110935 transitions. [2021-06-05 14:13:45,373 INFO L78 Accepts]: Start accepts. Automaton has 26985 states and 110935 transitions. Word has length 31 [2021-06-05 14:13:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:45,373 INFO L482 AbstractCegarLoop]: Abstraction has 26985 states and 110935 transitions. [2021-06-05 14:13:45,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 26985 states and 110935 transitions. [2021-06-05 14:13:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:13:45,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:45,439 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:45,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:45,653 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash -888811328, now seen corresponding path program 25 times [2021-06-05 14:13:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:45,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636326579] [2021-06-05 14:13:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:45,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:45,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636326579] [2021-06-05 14:13:45,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636326579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:45,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302365482] [2021-06-05 14:13:45,715 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:45,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:13:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:46,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302365482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:46,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:46,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-06-05 14:13:46,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034153906] [2021-06-05 14:13:46,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:13:46,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:46,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:13:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:13:46,116 INFO L87 Difference]: Start difference. First operand 26985 states and 110935 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:46,803 INFO L93 Difference]: Finished difference Result 30378 states and 123415 transitions. [2021-06-05 14:13:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:13:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 14:13:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:46,900 INFO L225 Difference]: With dead ends: 30378 [2021-06-05 14:13:46,900 INFO L226 Difference]: Without dead ends: 30174 [2021-06-05 14:13:46,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:13:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30174 states. [2021-06-05 14:13:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30174 to 27681. [2021-06-05 14:13:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27681 states, 27680 states have (on average 4.11296965317919) internal successors, (113847), 27680 states have internal predecessors, (113847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27681 states to 27681 states and 113847 transitions. [2021-06-05 14:13:47,744 INFO L78 Accepts]: Start accepts. Automaton has 27681 states and 113847 transitions. Word has length 31 [2021-06-05 14:13:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:47,744 INFO L482 AbstractCegarLoop]: Abstraction has 27681 states and 113847 transitions. [2021-06-05 14:13:47,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 27681 states and 113847 transitions. [2021-06-05 14:13:47,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:13:47,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:47,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:48,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 14:13:48,029 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:48,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1735840200, now seen corresponding path program 26 times [2021-06-05 14:13:48,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:48,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478107867] [2021-06-05 14:13:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:13:48,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:48,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478107867] [2021-06-05 14:13:48,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478107867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:48,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133205968] [2021-06-05 14:13:48,095 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:48,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:13:48,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:48,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:13:48,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:48,388 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-06-05 14:13:48,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 14:13:48,605 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-06-05 14:13:48,615 INFO L168 Benchmark]: Toolchain (without parser) took 91166.16 ms. Allocated memory was 362.8 MB in the beginning and 10.3 GB in the end (delta: 10.0 GB). Free memory was 342.0 MB in the beginning and 7.7 GB in the end (delta: -7.3 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.0 GB. [2021-06-05 14:13:48,616 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 362.8 MB. Free memory is still 343.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:13:48,616 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.67 ms. Allocated memory is still 362.8 MB. Free memory was 341.9 MB in the beginning and 340.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:13:48,616 INFO L168 Benchmark]: Boogie Preprocessor took 12.66 ms. Allocated memory is still 362.8 MB. Free memory was 340.5 MB in the beginning and 339.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:13:48,616 INFO L168 Benchmark]: RCFGBuilder took 217.76 ms. Allocated memory is still 362.8 MB. Free memory was 339.3 MB in the beginning and 327.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 14:13:48,616 INFO L168 Benchmark]: TraceAbstraction took 90910.65 ms. Allocated memory was 362.8 MB in the beginning and 10.3 GB in the end (delta: 10.0 GB). Free memory was 327.3 MB in the beginning and 7.7 GB in the end (delta: -7.4 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.0 GB. [2021-06-05 14:13:48,628 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 0.09 ms. Allocated memory is still 362.8 MB. Free memory is still 343.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.67 ms. Allocated memory is still 362.8 MB. Free memory was 341.9 MB in the beginning and 340.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.66 ms. Allocated memory is still 362.8 MB. Free memory was 340.5 MB in the beginning and 339.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 217.76 ms. Allocated memory is still 362.8 MB. Free memory was 339.3 MB in the beginning and 327.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 90910.65 ms. Allocated memory was 362.8 MB in the beginning and 10.3 GB in the end (delta: 10.0 GB). Free memory was 327.3 MB in the beginning and 7.7 GB in the end (delta: -7.4 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...