/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:25:59,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:25:59,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:25:59,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:25:59,134 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:25:59,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:25:59,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:25:59,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:25:59,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:25:59,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:25:59,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:25:59,166 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:25:59,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:25:59,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:25:59,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:25:59,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:25:59,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:25:59,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:25:59,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:25:59,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:25:59,167 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:25:59,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:25:59,167 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:25:59,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:25:59,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:25:59,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:25:59,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:25:59,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:25:59,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:25:59,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:25:59,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:25:59,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:25:59,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:25:59,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:25:59,176 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:25:59,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:25:59,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:25:59,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:25:59,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:25:59,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:25:59,434 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:25:59,435 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:25:59,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl [2021-07-13 19:25:59,436 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl' [2021-07-13 19:25:59,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:25:59,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:25:59,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:25:59,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:25:59,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:25:59,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:25:59,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:25:59,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:25:59,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:25:59,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... [2021-07-13 19:25:59,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:25:59,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:25:59,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:25:59,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:25:59,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:25:59,564 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:25:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:25:59,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:25:59,564 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:25:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:25:59,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:25:59,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:25:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:25:59,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:25:59,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:25:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:25:59,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:25:59,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 19:25:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 19:25:59,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 19:25:59,567 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:25:59,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:25:59,726 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:25:59,727 INFO L202 PluginConnector]: Adding new model exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:25:59 BoogieIcfgContainer [2021-07-13 19:25:59,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:25:59,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:25:59,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:25:59,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:25:59,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:59" (1/2) ... [2021-07-13 19:25:59,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af5afa7 and model type exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:25:59, skipping insertion in model container [2021-07-13 19:25:59,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:25:59" (2/2) ... [2021-07-13 19:25:59,731 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x3.wvr.bpl [2021-07-13 19:25:59,735 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:25:59,736 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:25:59,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:25:59,736 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:25:59,800 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 19:25:59,815 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 19:25:59,843 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:25:59,843 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:25:59,844 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:25:59,844 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:25:59,844 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:25:59,844 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:25:59,844 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:25:59,844 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:25:59,850 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-07-13 19:25:59,909 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:25:59,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:59,929 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:59,930 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:59,936 INFO L82 PathProgramCache]: Analyzing trace with hash -786123805, now seen corresponding path program 1 times [2021-07-13 19:25:59,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:59,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841062979] [2021-07-13 19:25:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841062979] [2021-07-13 19:26:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841062979] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:00,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:00,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:26:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546906530] [2021-07-13 19:26:00,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:26:00,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:00,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:26:00,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:26:00,135 INFO L87 Difference]: Start difference. First operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 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) [2021-07-13 19:26:00,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:00,225 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-07-13 19:26:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:26:00,226 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 [2021-07-13 19:26:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:00,244 INFO L225 Difference]: With dead ends: 854 [2021-07-13 19:26:00,245 INFO L226 Difference]: Without dead ends: 823 [2021-07-13 19:26:00,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:26:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-07-13 19:26:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-07-13 19:26:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-07-13 19:26:00,339 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-07-13 19:26:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:00,339 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-07-13 19:26:00,339 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) [2021-07-13 19:26:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-07-13 19:26:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:26:00,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:00,343 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:00,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:26:00,344 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash 707778243, now seen corresponding path program 1 times [2021-07-13 19:26:00,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:00,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843350706] [2021-07-13 19:26:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:00,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843350706] [2021-07-13 19:26:00,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843350706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:00,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649857693] [2021-07-13 19:26:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:00,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:26:00,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649857693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:00,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:00,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 19:26:00,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633760758] [2021-07-13 19:26:00,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:26:00,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:26:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:26:00,538 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:00,612 INFO L93 Difference]: Finished difference Result 1354 states and 5079 transitions. [2021-07-13 19:26:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:26:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:26:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:00,620 INFO L225 Difference]: With dead ends: 1354 [2021-07-13 19:26:00,620 INFO L226 Difference]: Without dead ends: 1354 [2021-07-13 19:26:00,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-13 19:26:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 687. [2021-07-13 19:26:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.956268221574344) internal successors, (2714), 686 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2714 transitions. [2021-07-13 19:26:00,662 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2714 transitions. Word has length 21 [2021-07-13 19:26:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:00,663 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2714 transitions. [2021-07-13 19:26:00,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2714 transitions. [2021-07-13 19:26:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:26:00,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:00,665 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:00,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:26:00,881 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1583514721, now seen corresponding path program 1 times [2021-07-13 19:26:00,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:00,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813611270] [2021-07-13 19:26:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:00,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813611270] [2021-07-13 19:26:00,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813611270] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:00,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:00,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:00,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128408655] [2021-07-13 19:26:00,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:00,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:00,923 INFO L87 Difference]: Start difference. First operand 687 states and 2714 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:00,957 INFO L93 Difference]: Finished difference Result 973 states and 3608 transitions. [2021-07-13 19:26:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:26:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:26:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:00,963 INFO L225 Difference]: With dead ends: 973 [2021-07-13 19:26:00,963 INFO L226 Difference]: Without dead ends: 953 [2021-07-13 19:26:00,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-13 19:26:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 775. [2021-07-13 19:26:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.8359173126614987) internal successors, (2969), 774 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2969 transitions. [2021-07-13 19:26:00,984 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2969 transitions. Word has length 21 [2021-07-13 19:26:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:00,984 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2969 transitions. [2021-07-13 19:26:00,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2969 transitions. [2021-07-13 19:26:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:26:00,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:00,986 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:00,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:26:00,986 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1014138907, now seen corresponding path program 1 times [2021-07-13 19:26:00,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:00,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147508970] [2021-07-13 19:26:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:01,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147508970] [2021-07-13 19:26:01,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147508970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:01,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523122140] [2021-07-13 19:26:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:26:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523122140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:01,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:01,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:26:01,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592704878] [2021-07-13 19:26:01,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:01,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:01,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:01,135 INFO L87 Difference]: Start difference. First operand 775 states and 2969 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:01,190 INFO L93 Difference]: Finished difference Result 1748 states and 6634 transitions. [2021-07-13 19:26:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:01,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:26:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:01,200 INFO L225 Difference]: With dead ends: 1748 [2021-07-13 19:26:01,200 INFO L226 Difference]: Without dead ends: 1748 [2021-07-13 19:26:01,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-07-13 19:26:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 931. [2021-07-13 19:26:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.968817204301075) internal successors, (3691), 930 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3691 transitions. [2021-07-13 19:26:01,235 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3691 transitions. Word has length 21 [2021-07-13 19:26:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:01,235 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3691 transitions. [2021-07-13 19:26:01,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3691 transitions. [2021-07-13 19:26:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:26:01,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:01,239 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:01,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:01,447 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1222977381, now seen corresponding path program 1 times [2021-07-13 19:26:01,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:01,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78734497] [2021-07-13 19:26:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:01,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78734497] [2021-07-13 19:26:01,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78734497] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:01,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:01,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:01,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148408830] [2021-07-13 19:26:01,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:01,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:01,474 INFO L87 Difference]: Start difference. First operand 931 states and 3691 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:01,527 INFO L93 Difference]: Finished difference Result 1477 states and 5627 transitions. [2021-07-13 19:26:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:01,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:26:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:01,535 INFO L225 Difference]: With dead ends: 1477 [2021-07-13 19:26:01,536 INFO L226 Difference]: Without dead ends: 1453 [2021-07-13 19:26:01,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-07-13 19:26:01,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 985. [2021-07-13 19:26:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.9227642276422765) internal successors, (3860), 984 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3860 transitions. [2021-07-13 19:26:01,567 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3860 transitions. Word has length 21 [2021-07-13 19:26:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:01,567 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 3860 transitions. [2021-07-13 19:26:01,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3860 transitions. [2021-07-13 19:26:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:26:01,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:01,571 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:01,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:26:01,571 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:01,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1181159269, now seen corresponding path program 2 times [2021-07-13 19:26:01,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:01,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767514403] [2021-07-13 19:26:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767514403] [2021-07-13 19:26:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767514403] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:01,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:01,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:01,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172685607] [2021-07-13 19:26:01,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:01,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:01,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:01,606 INFO L87 Difference]: Start difference. First operand 985 states and 3860 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:01,656 INFO L93 Difference]: Finished difference Result 1520 states and 5831 transitions. [2021-07-13 19:26:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:01,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:26:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:01,665 INFO L225 Difference]: With dead ends: 1520 [2021-07-13 19:26:01,665 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 19:26:01,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 19:26:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1119. [2021-07-13 19:26:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.952593917710197) internal successors, (4419), 1118 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 4419 transitions. [2021-07-13 19:26:01,704 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 4419 transitions. Word has length 21 [2021-07-13 19:26:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:01,705 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 4419 transitions. [2021-07-13 19:26:01,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 4419 transitions. [2021-07-13 19:26:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:26:01,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:01,707 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:01,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:26:01,708 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:01,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1390219805, now seen corresponding path program 2 times [2021-07-13 19:26:01,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:01,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682405548] [2021-07-13 19:26:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:01,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682405548] [2021-07-13 19:26:01,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682405548] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:01,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:01,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:01,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490541921] [2021-07-13 19:26:01,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:01,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:01,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:01,740 INFO L87 Difference]: Start difference. First operand 1119 states and 4419 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:01,784 INFO L93 Difference]: Finished difference Result 1519 states and 5747 transitions. [2021-07-13 19:26:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:26:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:01,792 INFO L225 Difference]: With dead ends: 1519 [2021-07-13 19:26:01,792 INFO L226 Difference]: Without dead ends: 1478 [2021-07-13 19:26:01,792 INFO L764 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 [2021-07-13 19:26:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-07-13 19:26:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1174. [2021-07-13 19:26:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.9028132992327365) internal successors, (4578), 1173 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4578 transitions. [2021-07-13 19:26:01,822 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 4578 transitions. Word has length 21 [2021-07-13 19:26:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:01,822 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 4578 transitions. [2021-07-13 19:26:01,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 4578 transitions. [2021-07-13 19:26:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:26:01,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:01,825 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:01,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:26:01,826 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1186899775, now seen corresponding path program 2 times [2021-07-13 19:26:01,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:01,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318320845] [2021-07-13 19:26:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:01,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318320845] [2021-07-13 19:26:01,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318320845] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:01,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:01,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:26:01,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908367873] [2021-07-13 19:26:01,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:26:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:26:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:01,865 INFO L87 Difference]: Start difference. First operand 1174 states and 4578 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:01,902 INFO L93 Difference]: Finished difference Result 1589 states and 6051 transitions. [2021-07-13 19:26:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:01,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:26:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:01,910 INFO L225 Difference]: With dead ends: 1589 [2021-07-13 19:26:01,910 INFO L226 Difference]: Without dead ends: 1589 [2021-07-13 19:26:01,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-07-13 19:26:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1285. [2021-07-13 19:26:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9088785046728973) internal successors, (5019), 1284 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5019 transitions. [2021-07-13 19:26:01,942 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5019 transitions. Word has length 21 [2021-07-13 19:26:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:01,943 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 5019 transitions. [2021-07-13 19:26:01,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5019 transitions. [2021-07-13 19:26:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:26:01,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:01,947 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:01,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:26:01,947 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:01,947 INFO L82 PathProgramCache]: Analyzing trace with hash -462723457, now seen corresponding path program 1 times [2021-07-13 19:26:01,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:01,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814419341] [2021-07-13 19:26:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:02,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:02,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814419341] [2021-07-13 19:26:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814419341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971510466] [2021-07-13 19:26:02,006 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 [2021-07-13 19:26:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:02,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:02,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:02,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971510466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:02,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-07-13 19:26:02,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796922595] [2021-07-13 19:26:02,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:26:02,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:02,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:26:02,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:02,168 INFO L87 Difference]: Start difference. First operand 1285 states and 5019 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:02,232 INFO L93 Difference]: Finished difference Result 2143 states and 8130 transitions. [2021-07-13 19:26:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 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 23 [2021-07-13 19:26:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:02,244 INFO L225 Difference]: With dead ends: 2143 [2021-07-13 19:26:02,244 INFO L226 Difference]: Without dead ends: 2075 [2021-07-13 19:26:02,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-07-13 19:26:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1564. [2021-07-13 19:26:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.9366602687140113) internal successors, (6153), 1563 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 6153 transitions. [2021-07-13 19:26:02,319 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 6153 transitions. Word has length 23 [2021-07-13 19:26:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:02,319 INFO L482 AbstractCegarLoop]: Abstraction has 1564 states and 6153 transitions. [2021-07-13 19:26:02,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 6153 transitions. [2021-07-13 19:26:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:26:02,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:02,323 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:02,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:02,540 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1935689983, now seen corresponding path program 2 times [2021-07-13 19:26:02,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:02,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952789508] [2021-07-13 19:26:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:02,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:02,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952789508] [2021-07-13 19:26:02,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952789508] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:02,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:02,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:02,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547565214] [2021-07-13 19:26:02,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:02,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:02,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:02,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:02,568 INFO L87 Difference]: Start difference. First operand 1564 states and 6153 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:02,746 INFO L93 Difference]: Finished difference Result 2365 states and 9064 transitions. [2021-07-13 19:26:02,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:26:02,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:26:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:02,754 INFO L225 Difference]: With dead ends: 2365 [2021-07-13 19:26:02,755 INFO L226 Difference]: Without dead ends: 2297 [2021-07-13 19:26:02,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-07-13 19:26:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1785. [2021-07-13 19:26:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.9551569506726456) internal successors, (7056), 1784 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7056 transitions. [2021-07-13 19:26:02,799 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 7056 transitions. Word has length 23 [2021-07-13 19:26:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:02,799 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 7056 transitions. [2021-07-13 19:26:02,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 7056 transitions. [2021-07-13 19:26:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:26:02,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:02,803 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:02,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:26:02,804 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:02,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1143796455, now seen corresponding path program 1 times [2021-07-13 19:26:02,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:02,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323169107] [2021-07-13 19:26:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:02,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:02,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323169107] [2021-07-13 19:26:02,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323169107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960597416] [2021-07-13 19:26:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:02,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960597416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:02,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-07-13 19:26:02,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162586338] [2021-07-13 19:26:02,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:26:02,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:26:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:02,946 INFO L87 Difference]: Start difference. First operand 1785 states and 7056 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:03,028 INFO L93 Difference]: Finished difference Result 2448 states and 9424 transitions. [2021-07-13 19:26:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:03,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 23 [2021-07-13 19:26:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:03,036 INFO L225 Difference]: With dead ends: 2448 [2021-07-13 19:26:03,036 INFO L226 Difference]: Without dead ends: 2397 [2021-07-13 19:26:03,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-13 19:26:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2051. [2021-07-13 19:26:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.951219512195122) internal successors, (8100), 2050 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 8100 transitions. [2021-07-13 19:26:03,093 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 8100 transitions. Word has length 23 [2021-07-13 19:26:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:03,094 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 8100 transitions. [2021-07-13 19:26:03,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 8100 transitions. [2021-07-13 19:26:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:26:03,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:03,098 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:03,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:03,313 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 774688287, now seen corresponding path program 2 times [2021-07-13 19:26:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:03,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137450535] [2021-07-13 19:26:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:03,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:03,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137450535] [2021-07-13 19:26:03,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137450535] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:03,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:03,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:03,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056469159] [2021-07-13 19:26:03,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:03,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:03,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:03,342 INFO L87 Difference]: Start difference. First operand 2051 states and 8100 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:03,399 INFO L93 Difference]: Finished difference Result 2710 states and 10468 transitions. [2021-07-13 19:26:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:26:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:26:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:03,407 INFO L225 Difference]: With dead ends: 2710 [2021-07-13 19:26:03,408 INFO L226 Difference]: Without dead ends: 2659 [2021-07-13 19:26:03,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-07-13 19:26:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2311. [2021-07-13 19:26:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 3.9484848484848483) internal successors, (9121), 2310 states have internal predecessors, (9121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 9121 transitions. [2021-07-13 19:26:03,460 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 9121 transitions. Word has length 23 [2021-07-13 19:26:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:03,460 INFO L482 AbstractCegarLoop]: Abstraction has 2311 states and 9121 transitions. [2021-07-13 19:26:03,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 9121 transitions. [2021-07-13 19:26:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:03,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:03,481 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:03,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:26:03,481 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:03,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:03,482 INFO L82 PathProgramCache]: Analyzing trace with hash -798934911, now seen corresponding path program 3 times [2021-07-13 19:26:03,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:03,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604487907] [2021-07-13 19:26:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:03,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:03,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604487907] [2021-07-13 19:26:03,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604487907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057608036] [2021-07-13 19:26:03,511 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:03,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:03,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:03,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:03,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057608036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:03,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:03,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833895787] [2021-07-13 19:26:03,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:03,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:03,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:03,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:03,607 INFO L87 Difference]: Start difference. First operand 2311 states and 9121 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:03,942 INFO L93 Difference]: Finished difference Result 6038 states and 23046 transitions. [2021-07-13 19:26:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:03,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 25 [2021-07-13 19:26:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:03,963 INFO L225 Difference]: With dead ends: 6038 [2021-07-13 19:26:03,963 INFO L226 Difference]: Without dead ends: 6038 [2021-07-13 19:26:03,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-07-13 19:26:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 2800. [2021-07-13 19:26:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 4.00821722043587) internal successors, (11219), 2799 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 11219 transitions. [2021-07-13 19:26:04,077 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 11219 transitions. Word has length 25 [2021-07-13 19:26:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:04,077 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 11219 transitions. [2021-07-13 19:26:04,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 11219 transitions. [2021-07-13 19:26:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:04,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:04,085 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:04,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:26:04,301 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1862904449, now seen corresponding path program 4 times [2021-07-13 19:26:04,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:04,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891527330] [2021-07-13 19:26:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:04,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:04,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891527330] [2021-07-13 19:26:04,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891527330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137522007] [2021-07-13 19:26:04,329 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:04,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:04,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:04,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:04,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:04,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137522007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:04,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:04,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731276846] [2021-07-13 19:26:04,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:04,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:04,418 INFO L87 Difference]: Start difference. First operand 2800 states and 11219 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:04,623 INFO L93 Difference]: Finished difference Result 5607 states and 21463 transitions. [2021-07-13 19:26:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 25 [2021-07-13 19:26:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:04,641 INFO L225 Difference]: With dead ends: 5607 [2021-07-13 19:26:04,641 INFO L226 Difference]: Without dead ends: 5495 [2021-07-13 19:26:04,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-07-13 19:26:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 3696. [2021-07-13 19:26:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 4.088227334235453) internal successors, (15106), 3695 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 15106 transitions. [2021-07-13 19:26:04,736 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 15106 transitions. Word has length 25 [2021-07-13 19:26:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:04,736 INFO L482 AbstractCegarLoop]: Abstraction has 3696 states and 15106 transitions. [2021-07-13 19:26:04,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 15106 transitions. [2021-07-13 19:26:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:04,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:04,745 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:04,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:04,965 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1040308611, now seen corresponding path program 5 times [2021-07-13 19:26:04,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:04,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290549461] [2021-07-13 19:26:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:04,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:04,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290549461] [2021-07-13 19:26:04,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290549461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257128044] [2021-07-13 19:26:04,985 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:05,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:26:05,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:05,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:05,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257128044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:05,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:05,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:05,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896580225] [2021-07-13 19:26:05,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:05,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:05,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:05,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:05,077 INFO L87 Difference]: Start difference. First operand 3696 states and 15106 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:05,251 INFO L93 Difference]: Finished difference Result 5302 states and 20641 transitions. [2021-07-13 19:26:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 25 [2021-07-13 19:26:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:05,268 INFO L225 Difference]: With dead ends: 5302 [2021-07-13 19:26:05,268 INFO L226 Difference]: Without dead ends: 5302 [2021-07-13 19:26:05,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-07-13 19:26:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 3659. [2021-07-13 19:26:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 4.064516129032258) internal successors, (14868), 3658 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 14868 transitions. [2021-07-13 19:26:05,380 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 14868 transitions. Word has length 25 [2021-07-13 19:26:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:05,380 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 14868 transitions. [2021-07-13 19:26:05,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 14868 transitions. [2021-07-13 19:26:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:05,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:05,388 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:05,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:26:05,605 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:05,605 INFO L82 PathProgramCache]: Analyzing trace with hash -593697735, now seen corresponding path program 6 times [2021-07-13 19:26:05,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:05,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963398323] [2021-07-13 19:26:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:05,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:05,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963398323] [2021-07-13 19:26:05,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963398323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:05,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486216316] [2021-07-13 19:26:05,623 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:05,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:26:05,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:05,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:05,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:05,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486216316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:05,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:05,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:05,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541764531] [2021-07-13 19:26:05,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:05,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:05,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:05,734 INFO L87 Difference]: Start difference. First operand 3659 states and 14868 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:05,884 INFO L93 Difference]: Finished difference Result 4788 states and 18687 transitions. [2021-07-13 19:26:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:05,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 25 [2021-07-13 19:26:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:05,896 INFO L225 Difference]: With dead ends: 4788 [2021-07-13 19:26:05,896 INFO L226 Difference]: Without dead ends: 4768 [2021-07-13 19:26:05,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-07-13 19:26:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3665. [2021-07-13 19:26:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 4.060316593886463) internal successors, (14877), 3664 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14877 transitions. [2021-07-13 19:26:05,978 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14877 transitions. Word has length 25 [2021-07-13 19:26:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:05,979 INFO L482 AbstractCegarLoop]: Abstraction has 3665 states and 14877 transitions. [2021-07-13 19:26:05,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14877 transitions. [2021-07-13 19:26:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:05,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:05,987 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:06,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:26:06,201 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1848382593, now seen corresponding path program 7 times [2021-07-13 19:26:06,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:06,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557581150] [2021-07-13 19:26:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:06,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:06,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557581150] [2021-07-13 19:26:06,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557581150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:06,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004252427] [2021-07-13 19:26:06,221 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:06,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004252427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:06,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:06,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:06,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631188889] [2021-07-13 19:26:06,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:06,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:06,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:06,367 INFO L87 Difference]: Start difference. First operand 3665 states and 14877 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:06,553 INFO L93 Difference]: Finished difference Result 7954 states and 31437 transitions. [2021-07-13 19:26:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:06,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:26:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:06,574 INFO L225 Difference]: With dead ends: 7954 [2021-07-13 19:26:06,574 INFO L226 Difference]: Without dead ends: 7954 [2021-07-13 19:26:06,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-07-13 19:26:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 4610. [2021-07-13 19:26:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 4.175092210891734) internal successors, (19243), 4609 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 19243 transitions. [2021-07-13 19:26:06,691 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 19243 transitions. Word has length 25 [2021-07-13 19:26:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:06,691 INFO L482 AbstractCegarLoop]: Abstraction has 4610 states and 19243 transitions. [2021-07-13 19:26:06,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 19243 transitions. [2021-07-13 19:26:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:06,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:06,701 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:06,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:26:06,919 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:06,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:06,919 INFO L82 PathProgramCache]: Analyzing trace with hash 340782337, now seen corresponding path program 8 times [2021-07-13 19:26:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:06,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634887598] [2021-07-13 19:26:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:06,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:06,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634887598] [2021-07-13 19:26:06,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634887598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:06,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436688733] [2021-07-13 19:26:06,942 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:06,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:06,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:06,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:06,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:07,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436688733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:07,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:07,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:07,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380505244] [2021-07-13 19:26:07,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:07,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:07,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:07,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:07,088 INFO L87 Difference]: Start difference. First operand 4610 states and 19243 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) [2021-07-13 19:26:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:07,258 INFO L93 Difference]: Finished difference Result 6087 states and 24217 transitions. [2021-07-13 19:26:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:07,258 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 [2021-07-13 19:26:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:07,277 INFO L225 Difference]: With dead ends: 6087 [2021-07-13 19:26:07,278 INFO L226 Difference]: Without dead ends: 6059 [2021-07-13 19:26:07,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-07-13 19:26:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 4587. [2021-07-13 19:26:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 4.174662014827737) internal successors, (19145), 4586 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19145 transitions. [2021-07-13 19:26:07,396 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 19145 transitions. Word has length 25 [2021-07-13 19:26:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:07,397 INFO L482 AbstractCegarLoop]: Abstraction has 4587 states and 19145 transitions. [2021-07-13 19:26:07,397 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) [2021-07-13 19:26:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 19145 transitions. [2021-07-13 19:26:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:07,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:07,407 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:07,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:26:07,621 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash -718170243, now seen corresponding path program 9 times [2021-07-13 19:26:07,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:07,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47379131] [2021-07-13 19:26:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:07,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47379131] [2021-07-13 19:26:07,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47379131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435188392] [2021-07-13 19:26:07,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:07,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:07,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:07,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:07,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:07,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435188392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:07,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:07,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:07,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735333999] [2021-07-13 19:26:07,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:07,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:07,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:07,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:07,739 INFO L87 Difference]: Start difference. First operand 4587 states and 19145 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-07-13 19:26:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:07,976 INFO L93 Difference]: Finished difference Result 6950 states and 27646 transitions. [2021-07-13 19:26:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:07,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 25 [2021-07-13 19:26:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:08,021 INFO L225 Difference]: With dead ends: 6950 [2021-07-13 19:26:08,021 INFO L226 Difference]: Without dead ends: 6950 [2021-07-13 19:26:08,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2021-07-13 19:26:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 4669. [2021-07-13 19:26:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.1782347900599826) internal successors, (19504), 4668 states have internal predecessors, (19504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19504 transitions. [2021-07-13 19:26:08,115 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19504 transitions. Word has length 25 [2021-07-13 19:26:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:08,115 INFO L482 AbstractCegarLoop]: Abstraction has 4669 states and 19504 transitions. [2021-07-13 19:26:08,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-07-13 19:26:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19504 transitions. [2021-07-13 19:26:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:08,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:08,126 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:08,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:08,337 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:08,338 INFO L82 PathProgramCache]: Analyzing trace with hash -271559367, now seen corresponding path program 10 times [2021-07-13 19:26:08,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:08,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570751694] [2021-07-13 19:26:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:08,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:08,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570751694] [2021-07-13 19:26:08,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570751694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:08,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753053865] [2021-07-13 19:26:08,360 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:08,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:08,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:08,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:08,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:08,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753053865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:08,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:08,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:08,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295150312] [2021-07-13 19:26:08,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:08,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:08,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:08,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:08,439 INFO L87 Difference]: Start difference. First operand 4669 states and 19504 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-07-13 19:26:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:08,613 INFO L93 Difference]: Finished difference Result 7627 states and 29903 transitions. [2021-07-13 19:26:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:26:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 25 [2021-07-13 19:26:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:08,634 INFO L225 Difference]: With dead ends: 7627 [2021-07-13 19:26:08,635 INFO L226 Difference]: Without dead ends: 7607 [2021-07-13 19:26:08,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2021-07-13 19:26:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4687. [2021-07-13 19:26:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 4.173068715322237) internal successors, (19555), 4686 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 19555 transitions. [2021-07-13 19:26:08,791 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 19555 transitions. Word has length 25 [2021-07-13 19:26:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:08,791 INFO L482 AbstractCegarLoop]: Abstraction has 4687 states and 19555 transitions. [2021-07-13 19:26:08,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-07-13 19:26:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 19555 transitions. [2021-07-13 19:26:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:08,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:08,801 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:09,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:09,047 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash -986916671, now seen corresponding path program 11 times [2021-07-13 19:26:09,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:09,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967790395] [2021-07-13 19:26:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:09,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:09,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967790395] [2021-07-13 19:26:09,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967790395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:09,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830185831] [2021-07-13 19:26:09,076 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:09,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:26:09,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:09,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:09,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:09,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830185831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:09,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:09,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:09,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965559307] [2021-07-13 19:26:09,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:09,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:09,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:09,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:09,185 INFO L87 Difference]: Start difference. First operand 4687 states and 19555 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:09,506 INFO L93 Difference]: Finished difference Result 7378 states and 29710 transitions. [2021-07-13 19:26:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 25 [2021-07-13 19:26:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:09,526 INFO L225 Difference]: With dead ends: 7378 [2021-07-13 19:26:09,526 INFO L226 Difference]: Without dead ends: 7378 [2021-07-13 19:26:09,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-07-13 19:26:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 5057. [2021-07-13 19:26:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 4.166139240506329) internal successors, (21064), 5056 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21064 transitions. [2021-07-13 19:26:09,631 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 21064 transitions. Word has length 25 [2021-07-13 19:26:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:09,631 INFO L482 AbstractCegarLoop]: Abstraction has 5057 states and 21064 transitions. [2021-07-13 19:26:09,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 21064 transitions. [2021-07-13 19:26:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:09,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:09,642 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:09,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:26:09,844 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:09,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1472804639, now seen corresponding path program 12 times [2021-07-13 19:26:09,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:09,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040349409] [2021-07-13 19:26:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:09,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:09,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040349409] [2021-07-13 19:26:09,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040349409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:09,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413071541] [2021-07-13 19:26:09,866 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:09,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:26:09,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:09,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413071541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:09,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:09,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:26:09,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52011784] [2021-07-13 19:26:09,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:09,939 INFO L87 Difference]: Start difference. First operand 5057 states and 21064 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:10,167 INFO L93 Difference]: Finished difference Result 7943 states and 31115 transitions. [2021-07-13 19:26:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 25 [2021-07-13 19:26:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:10,189 INFO L225 Difference]: With dead ends: 7943 [2021-07-13 19:26:10,189 INFO L226 Difference]: Without dead ends: 7883 [2021-07-13 19:26:10,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-07-13 19:26:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 5255. [2021-07-13 19:26:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.142558051008756) internal successors, (21765), 5254 states have internal predecessors, (21765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 21765 transitions. [2021-07-13 19:26:10,320 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 21765 transitions. Word has length 25 [2021-07-13 19:26:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:10,320 INFO L482 AbstractCegarLoop]: Abstraction has 5255 states and 21765 transitions. [2021-07-13 19:26:10,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 21765 transitions. [2021-07-13 19:26:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:10,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:10,332 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:10,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:10,549 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:10,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1934629399, now seen corresponding path program 3 times [2021-07-13 19:26:10,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:10,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795325700] [2021-07-13 19:26:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:10,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:10,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795325700] [2021-07-13 19:26:10,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795325700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:10,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578481919] [2021-07-13 19:26:10,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:10,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:10,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:10,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:10,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:10,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578481919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:10,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:10,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:26:10,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807155536] [2021-07-13 19:26:10,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:10,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:10,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:10,664 INFO L87 Difference]: Start difference. First operand 5255 states and 21765 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:11,008 INFO L93 Difference]: Finished difference Result 15644 states and 64448 transitions. [2021-07-13 19:26:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:26:11,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:11,054 INFO L225 Difference]: With dead ends: 15644 [2021-07-13 19:26:11,054 INFO L226 Difference]: Without dead ends: 15644 [2021-07-13 19:26:11,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:26:11,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2021-07-13 19:26:11,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 7401. [2021-07-13 19:26:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7401 states, 7400 states have (on average 4.2628378378378375) internal successors, (31545), 7400 states have internal predecessors, (31545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 31545 transitions. [2021-07-13 19:26:11,307 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 31545 transitions. Word has length 25 [2021-07-13 19:26:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:11,307 INFO L482 AbstractCegarLoop]: Abstraction has 7401 states and 31545 transitions. [2021-07-13 19:26:11,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 31545 transitions. [2021-07-13 19:26:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:11,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:11,323 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:11,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:26:11,524 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash 450475369, now seen corresponding path program 4 times [2021-07-13 19:26:11,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:11,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609561764] [2021-07-13 19:26:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:11,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:11,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609561764] [2021-07-13 19:26:11,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609561764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:11,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060553603] [2021-07-13 19:26:11,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:11,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:11,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:11,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:11,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:11,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060553603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:11,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:11,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:26:11,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662193521] [2021-07-13 19:26:11,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:11,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:11,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:11,629 INFO L87 Difference]: Start difference. First operand 7401 states and 31545 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:11,842 INFO L93 Difference]: Finished difference Result 14414 states and 59525 transitions. [2021-07-13 19:26:11,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:11,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:11,884 INFO L225 Difference]: With dead ends: 14414 [2021-07-13 19:26:11,884 INFO L226 Difference]: Without dead ends: 14318 [2021-07-13 19:26:11,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14318 states. [2021-07-13 19:26:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14318 to 9947. [2021-07-13 19:26:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 4.3626583551176354) internal successors, (43391), 9946 states have internal predecessors, (43391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 43391 transitions. [2021-07-13 19:26:12,220 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 43391 transitions. Word has length 25 [2021-07-13 19:26:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:12,220 INFO L482 AbstractCegarLoop]: Abstraction has 9947 states and 43391 transitions. [2021-07-13 19:26:12,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 43391 transitions. [2021-07-13 19:26:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:12,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:12,241 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:12,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:12,442 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1532446057, now seen corresponding path program 5 times [2021-07-13 19:26:12,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:12,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985128024] [2021-07-13 19:26:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:12,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:12,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985128024] [2021-07-13 19:26:12,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985128024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:12,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29322439] [2021-07-13 19:26:12,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:26:12,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:26:12,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:12,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:12,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29322439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:12,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:12,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-13 19:26:12,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688641210] [2021-07-13 19:26:12,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:12,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:12,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:12,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:12,552 INFO L87 Difference]: Start difference. First operand 9947 states and 43391 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:12,832 INFO L93 Difference]: Finished difference Result 14334 states and 59778 transitions. [2021-07-13 19:26:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:26:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:12,875 INFO L225 Difference]: With dead ends: 14334 [2021-07-13 19:26:12,875 INFO L226 Difference]: Without dead ends: 14334 [2021-07-13 19:26:12,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-07-13 19:26:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9809. [2021-07-13 19:26:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9809 states, 9808 states have (on average 4.337173735725938) internal successors, (42539), 9808 states have internal predecessors, (42539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9809 states to 9809 states and 42539 transitions. [2021-07-13 19:26:13,171 INFO L78 Accepts]: Start accepts. Automaton has 9809 states and 42539 transitions. Word has length 25 [2021-07-13 19:26:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:13,171 INFO L482 AbstractCegarLoop]: Abstraction has 9809 states and 42539 transitions. [2021-07-13 19:26:13,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9809 states and 42539 transitions. [2021-07-13 19:26:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:13,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:13,192 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:26:13,393 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1741506593, now seen corresponding path program 6 times [2021-07-13 19:26:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746931001] [2021-07-13 19:26:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:13,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:13,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746931001] [2021-07-13 19:26:13,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746931001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:13,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25430984] [2021-07-13 19:26:13,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:13,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:26:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:13,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25430984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:13,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:13,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-13 19:26:13,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754874172] [2021-07-13 19:26:13,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:13,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:13,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:13,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:13,506 INFO L87 Difference]: Start difference. First operand 9809 states and 42539 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:13,743 INFO L93 Difference]: Finished difference Result 12691 states and 52781 transitions. [2021-07-13 19:26:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:13,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:13,790 INFO L225 Difference]: With dead ends: 12691 [2021-07-13 19:26:13,790 INFO L226 Difference]: Without dead ends: 12666 [2021-07-13 19:26:13,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2021-07-13 19:26:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 9875. [2021-07-13 19:26:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.332388089933158) internal successors, (42778), 9874 states have internal predecessors, (42778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42778 transitions. [2021-07-13 19:26:14,092 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42778 transitions. Word has length 25 [2021-07-13 19:26:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:14,092 INFO L482 AbstractCegarLoop]: Abstraction has 9875 states and 42778 transitions. [2021-07-13 19:26:14,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42778 transitions. [2021-07-13 19:26:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:14,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:14,112 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:14,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:26:14,313 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192415, now seen corresponding path program 7 times [2021-07-13 19:26:14,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:14,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611939169] [2021-07-13 19:26:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:14,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:14,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611939169] [2021-07-13 19:26:14,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611939169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:14,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489839273] [2021-07-13 19:26:14,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:14,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489839273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:14,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:14,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-13 19:26:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54097813] [2021-07-13 19:26:14,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:14,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:14,412 INFO L87 Difference]: Start difference. First operand 9875 states and 42778 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:14,601 INFO L93 Difference]: Finished difference Result 16572 states and 68392 transitions. [2021-07-13 19:26:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 25 [2021-07-13 19:26:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:14,652 INFO L225 Difference]: With dead ends: 16572 [2021-07-13 19:26:14,652 INFO L226 Difference]: Without dead ends: 16572 [2021-07-13 19:26:14,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16572 states. [2021-07-13 19:26:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16572 to 9875. [2021-07-13 19:26:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.3184119910877055) internal successors, (42640), 9874 states have internal predecessors, (42640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42640 transitions. [2021-07-13 19:26:15,036 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42640 transitions. Word has length 25 [2021-07-13 19:26:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:15,036 INFO L482 AbstractCegarLoop]: Abstraction has 9875 states and 42640 transitions. [2021-07-13 19:26:15,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42640 transitions. [2021-07-13 19:26:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:15,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:15,056 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:15,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:26:15,265 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2075155807, now seen corresponding path program 8 times [2021-07-13 19:26:15,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:15,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535667883] [2021-07-13 19:26:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:15,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:15,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535667883] [2021-07-13 19:26:15,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535667883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:15,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694490383] [2021-07-13 19:26:15,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:15,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:15,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:15,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:15,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:15,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694490383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:15,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:15,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-13 19:26:15,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399214272] [2021-07-13 19:26:15,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:15,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:15,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:15,356 INFO L87 Difference]: Start difference. First operand 9875 states and 42640 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:15,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:15,575 INFO L93 Difference]: Finished difference Result 13953 states and 57309 transitions. [2021-07-13 19:26:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:15,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:15,618 INFO L225 Difference]: With dead ends: 13953 [2021-07-13 19:26:15,618 INFO L226 Difference]: Without dead ends: 13929 [2021-07-13 19:26:15,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13929 states. [2021-07-13 19:26:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13929 to 9623. [2021-07-13 19:26:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 9622 states have (on average 4.305757638744543) internal successors, (41430), 9622 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 41430 transitions. [2021-07-13 19:26:15,942 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 41430 transitions. Word has length 25 [2021-07-13 19:26:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:15,942 INFO L482 AbstractCegarLoop]: Abstraction has 9623 states and 41430 transitions. [2021-07-13 19:26:15,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 41430 transitions. [2021-07-13 19:26:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:15,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:15,964 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:16,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:26:16,177 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash 539314849, now seen corresponding path program 9 times [2021-07-13 19:26:16,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:16,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924636151] [2021-07-13 19:26:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:16,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:16,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924636151] [2021-07-13 19:26:16,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924636151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:16,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697299879] [2021-07-13 19:26:16,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:16,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:16,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:16,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697299879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:16,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:16,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-13 19:26:16,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265406210] [2021-07-13 19:26:16,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:16,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:16,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:16,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:16,275 INFO L87 Difference]: Start difference. First operand 9623 states and 41430 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:16,641 INFO L93 Difference]: Finished difference Result 16966 states and 70031 transitions. [2021-07-13 19:26:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:16,691 INFO L225 Difference]: With dead ends: 16966 [2021-07-13 19:26:16,691 INFO L226 Difference]: Without dead ends: 16966 [2021-07-13 19:26:16,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-07-13 19:26:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 9761. [2021-07-13 19:26:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.303893442622951) internal successors, (42006), 9760 states have internal predecessors, (42006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 42006 transitions. [2021-07-13 19:26:17,049 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 42006 transitions. Word has length 25 [2021-07-13 19:26:17,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:17,049 INFO L482 AbstractCegarLoop]: Abstraction has 9761 states and 42006 transitions. [2021-07-13 19:26:17,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 42006 transitions. [2021-07-13 19:26:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:17,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:17,067 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:17,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:26:17,268 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:17,268 INFO L82 PathProgramCache]: Analyzing trace with hash 748375385, now seen corresponding path program 10 times [2021-07-13 19:26:17,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:17,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758731213] [2021-07-13 19:26:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:17,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:17,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758731213] [2021-07-13 19:26:17,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758731213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:17,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706257423] [2021-07-13 19:26:17,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:17,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:17,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:17,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706257423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:17,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:17,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-13 19:26:17,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702293900] [2021-07-13 19:26:17,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:17,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:17,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:17,380 INFO L87 Difference]: Start difference. First operand 9761 states and 42006 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:17,567 INFO L93 Difference]: Finished difference Result 15336 states and 62550 transitions. [2021-07-13 19:26:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:17,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:17,612 INFO L225 Difference]: With dead ends: 15336 [2021-07-13 19:26:17,612 INFO L226 Difference]: Without dead ends: 15311 [2021-07-13 19:26:17,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2021-07-13 19:26:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 9761. [2021-07-13 19:26:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.30266393442623) internal successors, (41994), 9760 states have internal predecessors, (41994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 41994 transitions. [2021-07-13 19:26:17,929 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 41994 transitions. Word has length 25 [2021-07-13 19:26:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:17,930 INFO L482 AbstractCegarLoop]: Abstraction has 9761 states and 41994 transitions. [2021-07-13 19:26:17,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,930 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 41994 transitions. [2021-07-13 19:26:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:17,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:17,949 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:18,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:18,150 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:18,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:18,150 INFO L82 PathProgramCache]: Analyzing trace with hash -334939811, now seen corresponding path program 11 times [2021-07-13 19:26:18,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:18,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156840197] [2021-07-13 19:26:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:18,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:18,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156840197] [2021-07-13 19:26:18,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156840197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:18,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535650100] [2021-07-13 19:26:18,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:18,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:26:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:18,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:18,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:18,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535650100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:18,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:18,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:26:18,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122979624] [2021-07-13 19:26:18,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:18,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:18,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:18,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:18,256 INFO L87 Difference]: Start difference. First operand 9761 states and 41994 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:18,590 INFO L93 Difference]: Finished difference Result 16139 states and 67397 transitions. [2021-07-13 19:26:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:26:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:18,640 INFO L225 Difference]: With dead ends: 16139 [2021-07-13 19:26:18,640 INFO L226 Difference]: Without dead ends: 16139 [2021-07-13 19:26:18,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:26:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2021-07-13 19:26:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 10624. [2021-07-13 19:26:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 10623 states have (on average 4.260284288807305) internal successors, (45257), 10623 states have internal predecessors, (45257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 45257 transitions. [2021-07-13 19:26:19,016 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 45257 transitions. Word has length 25 [2021-07-13 19:26:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:19,017 INFO L482 AbstractCegarLoop]: Abstraction has 10624 states and 45257 transitions. [2021-07-13 19:26:19,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 45257 transitions. [2021-07-13 19:26:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:19,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:19,040 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:19,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:26:19,242 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash 284595889, now seen corresponding path program 12 times [2021-07-13 19:26:19,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:19,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656260584] [2021-07-13 19:26:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:19,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:19,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656260584] [2021-07-13 19:26:19,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656260584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:19,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244857081] [2021-07-13 19:26:19,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:19,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:26:19,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:26:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:19,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244857081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:19,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:19,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:26:19,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65148719] [2021-07-13 19:26:19,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:19,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:19,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:19,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:19,354 INFO L87 Difference]: Start difference. First operand 10624 states and 45257 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:19,585 INFO L93 Difference]: Finished difference Result 15510 states and 62671 transitions. [2021-07-13 19:26:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:19,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:19,733 INFO L225 Difference]: With dead ends: 15510 [2021-07-13 19:26:19,733 INFO L226 Difference]: Without dead ends: 15419 [2021-07-13 19:26:19,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15419 states. [2021-07-13 19:26:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15419 to 11124. [2021-07-13 19:26:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11123 states have (on average 4.2321316191674905) internal successors, (47074), 11123 states have internal predecessors, (47074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 47074 transitions. [2021-07-13 19:26:19,962 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 47074 transitions. Word has length 25 [2021-07-13 19:26:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:19,962 INFO L482 AbstractCegarLoop]: Abstraction has 11124 states and 47074 transitions. [2021-07-13 19:26:19,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 47074 transitions. [2021-07-13 19:26:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:19,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:19,984 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:20,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:20,184 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash 886244355, now seen corresponding path program 13 times [2021-07-13 19:26:20,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:20,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587249168] [2021-07-13 19:26:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:20,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:20,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587249168] [2021-07-13 19:26:20,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587249168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:20,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959289681] [2021-07-13 19:26:20,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:20,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:20,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959289681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:20,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:20,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:20,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148921434] [2021-07-13 19:26:20,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:20,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:20,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:20,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:20,492 INFO L87 Difference]: Start difference. First operand 11124 states and 47074 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-07-13 19:26:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:20,697 INFO L93 Difference]: Finished difference Result 12725 states and 52883 transitions. [2021-07-13 19:26:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 27 [2021-07-13 19:26:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:20,738 INFO L225 Difference]: With dead ends: 12725 [2021-07-13 19:26:20,738 INFO L226 Difference]: Without dead ends: 12657 [2021-07-13 19:26:20,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2021-07-13 19:26:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 11743. [2021-07-13 19:26:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 4.222619655935956) internal successors, (49582), 11742 states have internal predecessors, (49582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 49582 transitions. [2021-07-13 19:26:21,147 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 49582 transitions. Word has length 27 [2021-07-13 19:26:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:21,147 INFO L482 AbstractCegarLoop]: Abstraction has 11743 states and 49582 transitions. [2021-07-13 19:26:21,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-07-13 19:26:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 49582 transitions. [2021-07-13 19:26:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:21,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:21,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:21,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:26:21,377 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:21,379 INFO L82 PathProgramCache]: Analyzing trace with hash 853474367, now seen corresponding path program 14 times [2021-07-13 19:26:21,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:21,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785841616] [2021-07-13 19:26:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:21,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:21,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785841616] [2021-07-13 19:26:21,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785841616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:21,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598861424] [2021-07-13 19:26:21,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:21,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:21,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:21,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:21,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598861424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:21,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:21,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-13 19:26:21,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749308456] [2021-07-13 19:26:21,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:21,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:21,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:21,550 INFO L87 Difference]: Start difference. First operand 11743 states and 49582 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:21,789 INFO L93 Difference]: Finished difference Result 13435 states and 55712 transitions. [2021-07-13 19:26:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:21,829 INFO L225 Difference]: With dead ends: 13435 [2021-07-13 19:26:21,829 INFO L226 Difference]: Without dead ends: 13299 [2021-07-13 19:26:21,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2021-07-13 19:26:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 11989. [2021-07-13 19:26:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11989 states, 11988 states have (on average 4.226976976976977) internal successors, (50673), 11988 states have internal predecessors, (50673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11989 states to 11989 states and 50673 transitions. [2021-07-13 19:26:22,176 INFO L78 Accepts]: Start accepts. Automaton has 11989 states and 50673 transitions. Word has length 27 [2021-07-13 19:26:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:22,176 INFO L482 AbstractCegarLoop]: Abstraction has 11989 states and 50673 transitions. [2021-07-13 19:26:22,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 11989 states and 50673 transitions. [2021-07-13 19:26:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:22,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:22,204 INFO L508 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, 1, 1] [2021-07-13 19:26:22,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:26:22,417 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:22,418 INFO L82 PathProgramCache]: Analyzing trace with hash -122502081, now seen corresponding path program 1 times [2021-07-13 19:26:22,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:22,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386089107] [2021-07-13 19:26:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:22,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:22,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386089107] [2021-07-13 19:26:22,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386089107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:22,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93925921] [2021-07-13 19:26:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:22,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:22,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93925921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:22,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:22,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-13 19:26:22,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196369593] [2021-07-13 19:26:22,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:22,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:22,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:22,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:22,690 INFO L87 Difference]: Start difference. First operand 11989 states and 50673 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) [2021-07-13 19:26:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:22,992 INFO L93 Difference]: Finished difference Result 12852 states and 53545 transitions. [2021-07-13 19:26:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:22,993 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 27 [2021-07-13 19:26:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:23,032 INFO L225 Difference]: With dead ends: 12852 [2021-07-13 19:26:23,032 INFO L226 Difference]: Without dead ends: 12484 [2021-07-13 19:26:23,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-07-13 19:26:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12212. [2021-07-13 19:26:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12212 states, 12211 states have (on average 4.207108344934895) internal successors, (51373), 12211 states have internal predecessors, (51373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12212 states to 12212 states and 51373 transitions. [2021-07-13 19:26:23,378 INFO L78 Accepts]: Start accepts. Automaton has 12212 states and 51373 transitions. Word has length 27 [2021-07-13 19:26:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:23,379 INFO L482 AbstractCegarLoop]: Abstraction has 12212 states and 51373 transitions. [2021-07-13 19:26:23,379 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) [2021-07-13 19:26:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 12212 states and 51373 transitions. [2021-07-13 19:26:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:23,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:23,403 INFO L508 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, 1, 1] [2021-07-13 19:26:23,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:26:23,603 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash -824262133, now seen corresponding path program 2 times [2021-07-13 19:26:23,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:23,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999778445] [2021-07-13 19:26:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:23,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:23,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999778445] [2021-07-13 19:26:23,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999778445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:23,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476051670] [2021-07-13 19:26:23,640 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:23,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:23,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:23,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:23,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:23,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476051670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:23,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:23,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-13 19:26:23,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139328783] [2021-07-13 19:26:23,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:23,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:23,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:23,785 INFO L87 Difference]: Start difference. First operand 12212 states and 51373 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:23,994 INFO L93 Difference]: Finished difference Result 12962 states and 53969 transitions. [2021-07-13 19:26:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:23,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,035 INFO L225 Difference]: With dead ends: 12962 [2021-07-13 19:26:24,036 INFO L226 Difference]: Without dead ends: 12648 [2021-07-13 19:26:24,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12648 states. [2021-07-13 19:26:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12648 to 12240. [2021-07-13 19:26:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12240 states, 12239 states have (on average 4.2166026636163085) internal successors, (51607), 12239 states have internal predecessors, (51607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12240 states to 12240 states and 51607 transitions. [2021-07-13 19:26:24,363 INFO L78 Accepts]: Start accepts. Automaton has 12240 states and 51607 transitions. Word has length 27 [2021-07-13 19:26:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:24,363 INFO L482 AbstractCegarLoop]: Abstraction has 12240 states and 51607 transitions. [2021-07-13 19:26:24,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 12240 states and 51607 transitions. [2021-07-13 19:26:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:24,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:24,387 INFO L508 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, 1, 1] [2021-07-13 19:26:24,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:26:24,588 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1674500287, now seen corresponding path program 3 times [2021-07-13 19:26:24,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:24,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329952223] [2021-07-13 19:26:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:24,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:24,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329952223] [2021-07-13 19:26:24,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329952223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:24,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346023207] [2021-07-13 19:26:24,630 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:24,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:24,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:24,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346023207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:24,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:24,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:24,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045268036] [2021-07-13 19:26:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:24,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:24,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:24,748 INFO L87 Difference]: Start difference. First operand 12240 states and 51607 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,944 INFO L93 Difference]: Finished difference Result 12764 states and 53549 transitions. [2021-07-13 19:26:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:24,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,982 INFO L225 Difference]: With dead ends: 12764 [2021-07-13 19:26:24,983 INFO L226 Difference]: Without dead ends: 12616 [2021-07-13 19:26:24,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12616 states. [2021-07-13 19:26:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 12484. [2021-07-13 19:26:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12484 states, 12483 states have (on average 4.215893615316831) internal successors, (52627), 12483 states have internal predecessors, (52627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12484 states to 12484 states and 52627 transitions. [2021-07-13 19:26:25,316 INFO L78 Accepts]: Start accepts. Automaton has 12484 states and 52627 transitions. Word has length 27 [2021-07-13 19:26:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:25,316 INFO L482 AbstractCegarLoop]: Abstraction has 12484 states and 52627 transitions. [2021-07-13 19:26:25,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 12484 states and 52627 transitions. [2021-07-13 19:26:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:25,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:25,342 INFO L508 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, 1, 1] [2021-07-13 19:26:25,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:26:25,542 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1879740499, now seen corresponding path program 4 times [2021-07-13 19:26:25,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:25,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753484994] [2021-07-13 19:26:25,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:25,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:25,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753484994] [2021-07-13 19:26:25,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753484994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:25,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200985273] [2021-07-13 19:26:25,595 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:25,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:25,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:25,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:25,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200985273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:25,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:25,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-13 19:26:25,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121223089] [2021-07-13 19:26:25,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:25,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:25,707 INFO L87 Difference]: Start difference. First operand 12484 states and 52627 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:25,968 INFO L93 Difference]: Finished difference Result 13344 states and 55451 transitions. [2021-07-13 19:26:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:26,009 INFO L225 Difference]: With dead ends: 13344 [2021-07-13 19:26:26,010 INFO L226 Difference]: Without dead ends: 12916 [2021-07-13 19:26:26,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12916 states. [2021-07-13 19:26:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12916 to 12072. [2021-07-13 19:26:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12072 states, 12071 states have (on average 4.212327064866209) internal successors, (50847), 12071 states have internal predecessors, (50847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12072 states to 12072 states and 50847 transitions. [2021-07-13 19:26:26,421 INFO L78 Accepts]: Start accepts. Automaton has 12072 states and 50847 transitions. Word has length 27 [2021-07-13 19:26:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:26,421 INFO L482 AbstractCegarLoop]: Abstraction has 12072 states and 50847 transitions. [2021-07-13 19:26:26,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 12072 states and 50847 transitions. [2021-07-13 19:26:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:26,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:26,448 INFO L508 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, 1, 1] [2021-07-13 19:26:26,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:26,648 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash -833402749, now seen corresponding path program 5 times [2021-07-13 19:26:26,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:26,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480759460] [2021-07-13 19:26:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:26,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480759460] [2021-07-13 19:26:26,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480759460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958841849] [2021-07-13 19:26:26,700 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:26,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:26:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:26,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:26,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958841849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:26,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:26,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602861935] [2021-07-13 19:26:26,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:26,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:26,834 INFO L87 Difference]: Start difference. First operand 12072 states and 50847 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:27,048 INFO L93 Difference]: Finished difference Result 12692 states and 53003 transitions. [2021-07-13 19:26:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:27,201 INFO L225 Difference]: With dead ends: 12692 [2021-07-13 19:26:27,201 INFO L226 Difference]: Without dead ends: 12544 [2021-07-13 19:26:27,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12544 states. [2021-07-13 19:26:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12544 to 12224. [2021-07-13 19:26:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12224 states, 12223 states have (on average 4.211813793667676) internal successors, (51481), 12223 states have internal predecessors, (51481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 51481 transitions. [2021-07-13 19:26:27,416 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 51481 transitions. Word has length 27 [2021-07-13 19:26:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:27,416 INFO L482 AbstractCegarLoop]: Abstraction has 12224 states and 51481 transitions. [2021-07-13 19:26:27,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 51481 transitions. [2021-07-13 19:26:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:27,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:27,441 INFO L508 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, 1, 1] [2021-07-13 19:26:27,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:26:27,641 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:27,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1371995579, now seen corresponding path program 6 times [2021-07-13 19:26:27,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:27,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967299104] [2021-07-13 19:26:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:27,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:27,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967299104] [2021-07-13 19:26:27,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967299104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830924182] [2021-07-13 19:26:27,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:27,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:26:27,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:27,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:27,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:27,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830924182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:27,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-13 19:26:27,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867647450] [2021-07-13 19:26:27,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:27,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:27,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:27,793 INFO L87 Difference]: Start difference. First operand 12224 states and 51481 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-07-13 19:26:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:28,074 INFO L93 Difference]: Finished difference Result 13227 states and 54835 transitions. [2021-07-13 19:26:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 27 [2021-07-13 19:26:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:28,115 INFO L225 Difference]: With dead ends: 13227 [2021-07-13 19:26:28,115 INFO L226 Difference]: Without dead ends: 12883 [2021-07-13 19:26:28,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12883 states. [2021-07-13 19:26:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12883 to 12275. [2021-07-13 19:26:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 12274 states have (on average 4.194150236271794) internal successors, (51479), 12274 states have internal predecessors, (51479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 51479 transitions. [2021-07-13 19:26:28,456 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 51479 transitions. Word has length 27 [2021-07-13 19:26:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:28,456 INFO L482 AbstractCegarLoop]: Abstraction has 12275 states and 51479 transitions. [2021-07-13 19:26:28,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-07-13 19:26:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 51479 transitions. [2021-07-13 19:26:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:28,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:28,481 INFO L508 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, 1, 1] [2021-07-13 19:26:28,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:26:28,682 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash -980525761, now seen corresponding path program 7 times [2021-07-13 19:26:28,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:28,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245954928] [2021-07-13 19:26:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:26:28,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:28,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245954928] [2021-07-13 19:26:28,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245954928] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:28,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:28,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:26:28,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937442337] [2021-07-13 19:26:28,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:26:28,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:26:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:28,719 INFO L87 Difference]: Start difference. First operand 12275 states and 51479 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:28,841 INFO L93 Difference]: Finished difference Result 12977 states and 53915 transitions. [2021-07-13 19:26:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:28,878 INFO L225 Difference]: With dead ends: 12977 [2021-07-13 19:26:28,878 INFO L226 Difference]: Without dead ends: 12779 [2021-07-13 19:26:28,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12779 states. [2021-07-13 19:26:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12779 to 12283. [2021-07-13 19:26:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12283 states, 12282 states have (on average 4.204934049829018) internal successors, (51645), 12282 states have internal predecessors, (51645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12283 states to 12283 states and 51645 transitions. [2021-07-13 19:26:29,265 INFO L78 Accepts]: Start accepts. Automaton has 12283 states and 51645 transitions. Word has length 27 [2021-07-13 19:26:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:29,265 INFO L482 AbstractCegarLoop]: Abstraction has 12283 states and 51645 transitions. [2021-07-13 19:26:29,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 12283 states and 51645 transitions. [2021-07-13 19:26:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:29,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:29,291 INFO L508 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, 1, 1] [2021-07-13 19:26:29,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-07-13 19:26:29,291 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1155883921, now seen corresponding path program 8 times [2021-07-13 19:26:29,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:29,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672768444] [2021-07-13 19:26:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:29,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:29,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672768444] [2021-07-13 19:26:29,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672768444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:29,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062027574] [2021-07-13 19:26:29,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:29,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:29,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:29,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:29,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062027574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:29,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:29,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:29,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918519106] [2021-07-13 19:26:29,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:29,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:29,448 INFO L87 Difference]: Start difference. First operand 12283 states and 51645 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:29,648 INFO L93 Difference]: Finished difference Result 12839 states and 53665 transitions. [2021-07-13 19:26:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:29,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:29,686 INFO L225 Difference]: With dead ends: 12839 [2021-07-13 19:26:29,686 INFO L226 Difference]: Without dead ends: 12707 [2021-07-13 19:26:29,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-07-13 19:26:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 12503. [2021-07-13 19:26:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12503 states, 12502 states have (on average 4.2051671732522795) internal successors, (52573), 12502 states have internal predecessors, (52573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 52573 transitions. [2021-07-13 19:26:30,103 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 52573 transitions. Word has length 27 [2021-07-13 19:26:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:30,103 INFO L482 AbstractCegarLoop]: Abstraction has 12503 states and 52573 transitions. [2021-07-13 19:26:30,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 52573 transitions. [2021-07-13 19:26:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:30,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:30,134 INFO L508 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, 1, 1] [2021-07-13 19:26:30,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:30,334 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:30,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1821247349, now seen corresponding path program 9 times [2021-07-13 19:26:30,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:30,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062238671] [2021-07-13 19:26:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:30,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:30,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062238671] [2021-07-13 19:26:30,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062238671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47281215] [2021-07-13 19:26:30,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:30,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:30,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:30,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47281215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:30,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-13 19:26:30,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485413128] [2021-07-13 19:26:30,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:30,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:30,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:30,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:30,516 INFO L87 Difference]: Start difference. First operand 12503 states and 52573 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:30,809 INFO L93 Difference]: Finished difference Result 13523 states and 55911 transitions. [2021-07-13 19:26:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:30,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:30,851 INFO L225 Difference]: With dead ends: 13523 [2021-07-13 19:26:30,852 INFO L226 Difference]: Without dead ends: 13127 [2021-07-13 19:26:30,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-07-13 19:26:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 12123. [2021-07-13 19:26:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12122 states have (on average 4.2003794753341035) internal successors, (50917), 12122 states have internal predecessors, (50917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 50917 transitions. [2021-07-13 19:26:31,334 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 50917 transitions. Word has length 27 [2021-07-13 19:26:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:31,334 INFO L482 AbstractCegarLoop]: Abstraction has 12123 states and 50917 transitions. [2021-07-13 19:26:31,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 50917 transitions. [2021-07-13 19:26:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:31,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:31,358 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:31,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 19:26:31,558 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash -806226241, now seen corresponding path program 15 times [2021-07-13 19:26:31,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:31,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013437911] [2021-07-13 19:26:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:31,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:31,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013437911] [2021-07-13 19:26:31,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013437911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:31,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920042655] [2021-07-13 19:26:31,589 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:31,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:31,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:31,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920042655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:31,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:31,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:31,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775127103] [2021-07-13 19:26:31,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:31,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:31,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:31,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:31,701 INFO L87 Difference]: Start difference. First operand 12123 states and 50917 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:31,913 INFO L93 Difference]: Finished difference Result 13671 states and 56537 transitions. [2021-07-13 19:26:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:31,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:31,954 INFO L225 Difference]: With dead ends: 13671 [2021-07-13 19:26:31,955 INFO L226 Difference]: Without dead ends: 13603 [2021-07-13 19:26:31,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13603 states. [2021-07-13 19:26:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13603 to 12633. [2021-07-13 19:26:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12633 states, 12632 states have (on average 4.193635212159594) internal successors, (52974), 12632 states have internal predecessors, (52974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 52974 transitions. [2021-07-13 19:26:32,366 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 52974 transitions. Word has length 27 [2021-07-13 19:26:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:32,366 INFO L482 AbstractCegarLoop]: Abstraction has 12633 states and 52974 transitions. [2021-07-13 19:26:32,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 52974 transitions. [2021-07-13 19:26:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:32,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:32,393 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:32,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:32,594 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1315696619, now seen corresponding path program 13 times [2021-07-13 19:26:32,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:32,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761013670] [2021-07-13 19:26:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:32,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:32,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761013670] [2021-07-13 19:26:32,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761013670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:32,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93761017] [2021-07-13 19:26:32,624 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 [2021-07-13 19:26:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:32,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93761017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:32,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:32,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:32,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627402590] [2021-07-13 19:26:32,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:32,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:32,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:32,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:32,730 INFO L87 Difference]: Start difference. First operand 12633 states and 52974 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:32,944 INFO L93 Difference]: Finished difference Result 13876 states and 57371 transitions. [2021-07-13 19:26:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:32,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 27 [2021-07-13 19:26:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:32,989 INFO L225 Difference]: With dead ends: 13876 [2021-07-13 19:26:32,989 INFO L226 Difference]: Without dead ends: 13825 [2021-07-13 19:26:32,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-07-13 19:26:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13229. [2021-07-13 19:26:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13229 states, 13228 states have (on average 4.175839129120049) internal successors, (55238), 13228 states have internal predecessors, (55238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13229 states to 13229 states and 55238 transitions. [2021-07-13 19:26:33,366 INFO L78 Accepts]: Start accepts. Automaton has 13229 states and 55238 transitions. Word has length 27 [2021-07-13 19:26:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:33,366 INFO L482 AbstractCegarLoop]: Abstraction has 13229 states and 55238 transitions. [2021-07-13 19:26:33,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 13229 states and 55238 transitions. [2021-07-13 19:26:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:33,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:33,395 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:33,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 19:26:33,597 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash 530281439, now seen corresponding path program 14 times [2021-07-13 19:26:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:33,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929342655] [2021-07-13 19:26:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:33,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:33,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929342655] [2021-07-13 19:26:33,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929342655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:33,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772221590] [2021-07-13 19:26:33,639 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 [2021-07-13 19:26:33,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:33,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:33,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772221590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:33,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:33,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-13 19:26:33,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804769644] [2021-07-13 19:26:33,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:26:33,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:33,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:26:33,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:33,750 INFO L87 Difference]: Start difference. First operand 13229 states and 55238 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:33,969 INFO L93 Difference]: Finished difference Result 14694 states and 60468 transitions. [2021-07-13 19:26:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:33,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:26:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:34,013 INFO L225 Difference]: With dead ends: 14694 [2021-07-13 19:26:34,013 INFO L226 Difference]: Without dead ends: 14592 [2021-07-13 19:26:34,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:26:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14592 states. [2021-07-13 19:26:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14592 to 13580. [2021-07-13 19:26:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13580 states, 13579 states have (on average 4.172472199720156) internal successors, (56658), 13579 states have internal predecessors, (56658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 56658 transitions. [2021-07-13 19:26:34,439 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 56658 transitions. Word has length 27 [2021-07-13 19:26:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:34,439 INFO L482 AbstractCegarLoop]: Abstraction has 13580 states and 56658 transitions. [2021-07-13 19:26:34,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 56658 transitions. [2021-07-13 19:26:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:34,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:34,469 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:34,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:26:34,673 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1257062111, now seen corresponding path program 15 times [2021-07-13 19:26:34,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:34,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308258356] [2021-07-13 19:26:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:34,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308258356] [2021-07-13 19:26:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308258356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807443578] [2021-07-13 19:26:34,708 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 [2021-07-13 19:26:34,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:34,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:26:34,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807443578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:34,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:26:34,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25078601] [2021-07-13 19:26:34,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:26:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:26:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:34,837 INFO L87 Difference]: Start difference. First operand 13580 states and 56658 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-07-13 19:26:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:35,080 INFO L93 Difference]: Finished difference Result 14707 states and 60689 transitions. [2021-07-13 19:26:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:26:35,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 27 [2021-07-13 19:26:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:35,246 INFO L225 Difference]: With dead ends: 14707 [2021-07-13 19:26:35,246 INFO L226 Difference]: Without dead ends: 14656 [2021-07-13 19:26:35,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:26:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-07-13 19:26:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 14011. [2021-07-13 19:26:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14011 states, 14010 states have (on average 4.164596716630978) internal successors, (58346), 14010 states have internal predecessors, (58346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14011 states to 14011 states and 58346 transitions. [2021-07-13 19:26:35,522 INFO L78 Accepts]: Start accepts. Automaton has 14011 states and 58346 transitions. Word has length 27 [2021-07-13 19:26:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:35,523 INFO L482 AbstractCegarLoop]: Abstraction has 14011 states and 58346 transitions. [2021-07-13 19:26:35,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-07-13 19:26:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 14011 states and 58346 transitions. [2021-07-13 19:26:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:35,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:35,554 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:35,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 19:26:35,755 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:35,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1381235451, now seen corresponding path program 16 times [2021-07-13 19:26:35,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:35,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943399953] [2021-07-13 19:26:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:35,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943399953] [2021-07-13 19:26:35,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943399953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770634022] [2021-07-13 19:26:35,787 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) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:35,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:35,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:35,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:35,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:35,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770634022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:35,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:35,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:26:35,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417781475] [2021-07-13 19:26:35,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:35,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:35,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:35,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:35,900 INFO L87 Difference]: Start difference. First operand 14011 states and 58346 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-07-13 19:26:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:37,198 INFO L93 Difference]: Finished difference Result 35846 states and 143690 transitions. [2021-07-13 19:26:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:26:37,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 29 [2021-07-13 19:26:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:37,320 INFO L225 Difference]: With dead ends: 35846 [2021-07-13 19:26:37,320 INFO L226 Difference]: Without dead ends: 35846 [2021-07-13 19:26:37,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 451.7ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:26:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35846 states. [2021-07-13 19:26:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35846 to 13413. [2021-07-13 19:26:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 4.137339695794811) internal successors, (55490), 13412 states have internal predecessors, (55490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 55490 transitions. [2021-07-13 19:26:37,886 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 55490 transitions. Word has length 29 [2021-07-13 19:26:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:37,887 INFO L482 AbstractCegarLoop]: Abstraction has 13413 states and 55490 transitions. [2021-07-13 19:26:37,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-07-13 19:26:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 55490 transitions. [2021-07-13 19:26:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:37,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:37,917 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:38,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:26:38,119 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:38,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1140848389, now seen corresponding path program 17 times [2021-07-13 19:26:38,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:38,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740096836] [2021-07-13 19:26:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:38,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:38,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740096836] [2021-07-13 19:26:38,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740096836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:38,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498429881] [2021-07-13 19:26:38,155 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 [2021-07-13 19:26:38,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:26:38,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:38,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498429881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:38,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:38,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:26:38,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652942278] [2021-07-13 19:26:38,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:38,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:38,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:38,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:38,267 INFO L87 Difference]: Start difference. First operand 13413 states and 55490 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-07-13 19:26:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:38,986 INFO L93 Difference]: Finished difference Result 29402 states and 114209 transitions. [2021-07-13 19:26:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:26:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 29 [2021-07-13 19:26:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:39,093 INFO L225 Difference]: With dead ends: 29402 [2021-07-13 19:26:39,093 INFO L226 Difference]: Without dead ends: 29122 [2021-07-13 19:26:39,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:26:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-07-13 19:26:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 16597. [2021-07-13 19:26:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16597 states, 16596 states have (on average 4.1867317425885755) internal successors, (69483), 16596 states have internal predecessors, (69483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16597 states to 16597 states and 69483 transitions. [2021-07-13 19:26:39,711 INFO L78 Accepts]: Start accepts. Automaton has 16597 states and 69483 transitions. Word has length 29 [2021-07-13 19:26:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:39,711 INFO L482 AbstractCegarLoop]: Abstraction has 16597 states and 69483 transitions. [2021-07-13 19:26:39,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-07-13 19:26:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 16597 states and 69483 transitions. [2021-07-13 19:26:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:39,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:39,747 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:39,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:39,948 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1632929023, now seen corresponding path program 18 times [2021-07-13 19:26:39,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:39,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395303370] [2021-07-13 19:26:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:39,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:39,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395303370] [2021-07-13 19:26:39,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395303370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811432797] [2021-07-13 19:26:39,973 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 [2021-07-13 19:26:39,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:26:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:40,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811432797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:40,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:40,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:26:40,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31291836] [2021-07-13 19:26:40,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:40,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:40,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:40,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:40,067 INFO L87 Difference]: Start difference. First operand 16597 states and 69483 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) [2021-07-13 19:26:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:40,567 INFO L93 Difference]: Finished difference Result 29479 states and 115492 transitions. [2021-07-13 19:26:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:26:40,567 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 29 [2021-07-13 19:26:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:40,857 INFO L225 Difference]: With dead ends: 29479 [2021-07-13 19:26:40,857 INFO L226 Difference]: Without dead ends: 29479 [2021-07-13 19:26:40,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29479 states. [2021-07-13 19:26:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29479 to 16486. [2021-07-13 19:26:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16486 states, 16485 states have (on average 4.176038823172581) internal successors, (68842), 16485 states have internal predecessors, (68842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16486 states to 16486 states and 68842 transitions. [2021-07-13 19:26:41,407 INFO L78 Accepts]: Start accepts. Automaton has 16486 states and 68842 transitions. Word has length 29 [2021-07-13 19:26:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:41,407 INFO L482 AbstractCegarLoop]: Abstraction has 16486 states and 68842 transitions. [2021-07-13 19:26:41,407 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) [2021-07-13 19:26:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 16486 states and 68842 transitions. [2021-07-13 19:26:41,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:41,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:41,443 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:41,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:26:41,649 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1186318147, now seen corresponding path program 19 times [2021-07-13 19:26:41,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:41,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001848630] [2021-07-13 19:26:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:41,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:41,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001848630] [2021-07-13 19:26:41,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001848630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:41,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106996203] [2021-07-13 19:26:41,676 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 [2021-07-13 19:26:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:41,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:41,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:41,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106996203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:41,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:41,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:26:41,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667024371] [2021-07-13 19:26:41,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:41,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:41,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:41,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:41,767 INFO L87 Difference]: Start difference. First operand 16486 states and 68842 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) [2021-07-13 19:26:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:42,325 INFO L93 Difference]: Finished difference Result 21742 states and 87217 transitions. [2021-07-13 19:26:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:42,326 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 29 [2021-07-13 19:26:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:42,409 INFO L225 Difference]: With dead ends: 21742 [2021-07-13 19:26:42,410 INFO L226 Difference]: Without dead ends: 21722 [2021-07-13 19:26:42,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21722 states. [2021-07-13 19:26:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21722 to 16564. [2021-07-13 19:26:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16564 states, 16563 states have (on average 4.172372154802874) internal successors, (69107), 16563 states have internal predecessors, (69107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16564 states to 16564 states and 69107 transitions. [2021-07-13 19:26:43,008 INFO L78 Accepts]: Start accepts. Automaton has 16564 states and 69107 transitions. Word has length 29 [2021-07-13 19:26:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:43,009 INFO L482 AbstractCegarLoop]: Abstraction has 16564 states and 69107 transitions. [2021-07-13 19:26:43,009 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) [2021-07-13 19:26:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 16564 states and 69107 transitions. [2021-07-13 19:26:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:43,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:43,044 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:43,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:43,245 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1221261249, now seen corresponding path program 20 times [2021-07-13 19:26:43,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:43,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478436396] [2021-07-13 19:26:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:43,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:43,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478436396] [2021-07-13 19:26:43,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478436396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:43,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767022944] [2021-07-13 19:26:43,281 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 [2021-07-13 19:26:43,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:43,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:43,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767022944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:43,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:43,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:26:43,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894924610] [2021-07-13 19:26:43,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:43,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:43,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:43,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:43,392 INFO L87 Difference]: Start difference. First operand 16564 states and 69107 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:44,155 INFO L93 Difference]: Finished difference Result 55537 states and 222253 transitions. [2021-07-13 19:26:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:26:44,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:44,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:44,401 INFO L225 Difference]: With dead ends: 55537 [2021-07-13 19:26:44,401 INFO L226 Difference]: Without dead ends: 55537 [2021-07-13 19:26:44,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:26:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55537 states. [2021-07-13 19:26:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55537 to 21381. [2021-07-13 19:26:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286623012160898) internal successors, (91648), 21380 states have internal predecessors, (91648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91648 transitions. [2021-07-13 19:26:45,490 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91648 transitions. Word has length 29 [2021-07-13 19:26:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:45,490 INFO L482 AbstractCegarLoop]: Abstraction has 21381 states and 91648 transitions. [2021-07-13 19:26:45,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91648 transitions. [2021-07-13 19:26:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:45,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:45,538 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:45,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:45,739 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:45,740 INFO L82 PathProgramCache]: Analyzing trace with hash -286339007, now seen corresponding path program 21 times [2021-07-13 19:26:45,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:45,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398708699] [2021-07-13 19:26:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:45,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:45,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398708699] [2021-07-13 19:26:45,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398708699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444179159] [2021-07-13 19:26:45,777 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 [2021-07-13 19:26:45,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:26:45,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:45,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:45,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:45,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444179159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:45,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:26:45,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697739076] [2021-07-13 19:26:45,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:45,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:45,888 INFO L87 Difference]: Start difference. First operand 21381 states and 91648 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:46,314 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 19:26:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:46,627 INFO L93 Difference]: Finished difference Result 35555 states and 142585 transitions. [2021-07-13 19:26:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:26:46,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:46,741 INFO L225 Difference]: With dead ends: 35555 [2021-07-13 19:26:46,741 INFO L226 Difference]: Without dead ends: 35499 [2021-07-13 19:26:46,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:26:46,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35499 states. [2021-07-13 19:26:47,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35499 to 21381. [2021-07-13 19:26:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286155285313377) internal successors, (91638), 21380 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91638 transitions. [2021-07-13 19:26:47,566 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91638 transitions. Word has length 29 [2021-07-13 19:26:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:47,566 INFO L482 AbstractCegarLoop]: Abstraction has 21381 states and 91638 transitions. [2021-07-13 19:26:47,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91638 transitions. [2021-07-13 19:26:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:47,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:47,609 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:47,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 19:26:47,811 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:47,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1345291587, now seen corresponding path program 22 times [2021-07-13 19:26:47,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:47,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220138029] [2021-07-13 19:26:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:47,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220138029] [2021-07-13 19:26:47,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220138029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061736898] [2021-07-13 19:26:47,850 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) [2021-07-13 19:26:47,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:47,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061736898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:47,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:26:47,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595583248] [2021-07-13 19:26:47,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:47,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:47,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:47,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:47,964 INFO L87 Difference]: Start difference. First operand 21381 states and 91638 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:48,785 INFO L93 Difference]: Finished difference Result 42043 states and 168835 transitions. [2021-07-13 19:26:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:26:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:48,950 INFO L225 Difference]: With dead ends: 42043 [2021-07-13 19:26:48,950 INFO L226 Difference]: Without dead ends: 42043 [2021-07-13 19:26:48,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:26:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42043 states. [2021-07-13 19:26:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42043 to 21474. [2021-07-13 19:26:49,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21474 states, 21473 states have (on average 4.284776230615191) internal successors, (92007), 21473 states have internal predecessors, (92007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21474 states to 21474 states and 92007 transitions. [2021-07-13 19:26:49,855 INFO L78 Accepts]: Start accepts. Automaton has 21474 states and 92007 transitions. Word has length 29 [2021-07-13 19:26:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:49,855 INFO L482 AbstractCegarLoop]: Abstraction has 21474 states and 92007 transitions. [2021-07-13 19:26:49,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 21474 states and 92007 transitions. [2021-07-13 19:26:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:49,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:49,907 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:50,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:50,107 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash -898680711, now seen corresponding path program 23 times [2021-07-13 19:26:50,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:50,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057889360] [2021-07-13 19:26:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:50,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:50,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057889360] [2021-07-13 19:26:50,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057889360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351851495] [2021-07-13 19:26:50,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:50,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:26:50,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:50,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:50,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:50,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351851495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:50,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:26:50,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119159489] [2021-07-13 19:26:50,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:50,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:50,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:50,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:50,232 INFO L87 Difference]: Start difference. First operand 21474 states and 92007 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:50,917 INFO L93 Difference]: Finished difference Result 42315 states and 169746 transitions. [2021-07-13 19:26:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:26:50,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:51,065 INFO L225 Difference]: With dead ends: 42315 [2021-07-13 19:26:51,065 INFO L226 Difference]: Without dead ends: 42275 [2021-07-13 19:26:51,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42275 states. [2021-07-13 19:26:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42275 to 21484. [2021-07-13 19:26:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 4.284038542103058) internal successors, (92034), 21483 states have internal predecessors, (92034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 92034 transitions. [2021-07-13 19:26:51,802 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 92034 transitions. Word has length 29 [2021-07-13 19:26:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:51,803 INFO L482 AbstractCegarLoop]: Abstraction has 21484 states and 92034 transitions. [2021-07-13 19:26:51,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 92034 transitions. [2021-07-13 19:26:51,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:51,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:51,852 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:52,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:26:52,052 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1614038015, now seen corresponding path program 24 times [2021-07-13 19:26:52,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:52,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303394187] [2021-07-13 19:26:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:52,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303394187] [2021-07-13 19:26:52,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303394187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249029904] [2021-07-13 19:26:52,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:52,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:52,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:52,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249029904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:52,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:52,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:26:52,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853992370] [2021-07-13 19:26:52,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:52,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:52,206 INFO L87 Difference]: Start difference. First operand 21484 states and 92034 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:53,077 INFO L93 Difference]: Finished difference Result 36111 states and 146587 transitions. [2021-07-13 19:26:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:26:53,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:53,199 INFO L225 Difference]: With dead ends: 36111 [2021-07-13 19:26:53,200 INFO L226 Difference]: Without dead ends: 36111 [2021-07-13 19:26:53,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:26:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36111 states. [2021-07-13 19:26:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36111 to 20508. [2021-07-13 19:26:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20508 states, 20507 states have (on average 4.257131711123031) internal successors, (87301), 20507 states have internal predecessors, (87301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20508 states to 20508 states and 87301 transitions. [2021-07-13 19:26:54,037 INFO L78 Accepts]: Start accepts. Automaton has 20508 states and 87301 transitions. Word has length 29 [2021-07-13 19:26:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:54,037 INFO L482 AbstractCegarLoop]: Abstraction has 20508 states and 87301 transitions. [2021-07-13 19:26:54,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 20508 states and 87301 transitions. [2021-07-13 19:26:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:54,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:54,079 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:54,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:54,281 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash 845683295, now seen corresponding path program 25 times [2021-07-13 19:26:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:54,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689785242] [2021-07-13 19:26:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:54,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:54,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689785242] [2021-07-13 19:26:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689785242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278928868] [2021-07-13 19:26:54,305 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 [2021-07-13 19:26:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:54,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278928868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:54,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:26:54,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37285639] [2021-07-13 19:26:54,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:54,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:54,406 INFO L87 Difference]: Start difference. First operand 20508 states and 87301 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:55,127 INFO L93 Difference]: Finished difference Result 36261 states and 145187 transitions. [2021-07-13 19:26:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:26:55,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:55,271 INFO L225 Difference]: With dead ends: 36261 [2021-07-13 19:26:55,271 INFO L226 Difference]: Without dead ends: 36201 [2021-07-13 19:26:55,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36201 states. [2021-07-13 19:26:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36201 to 20844. [2021-07-13 19:26:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20844 states, 20843 states have (on average 4.25269874778103) internal successors, (88639), 20843 states have internal predecessors, (88639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20844 states to 20844 states and 88639 transitions. [2021-07-13 19:26:55,918 INFO L78 Accepts]: Start accepts. Automaton has 20844 states and 88639 transitions. Word has length 29 [2021-07-13 19:26:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:55,918 INFO L482 AbstractCegarLoop]: Abstraction has 20844 states and 88639 transitions. [2021-07-13 19:26:55,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20844 states and 88639 transitions. [2021-07-13 19:26:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:55,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:55,961 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:56,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:26:56,163 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1550654085, now seen corresponding path program 26 times [2021-07-13 19:26:56,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:56,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445292889] [2021-07-13 19:26:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:56,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445292889] [2021-07-13 19:26:56,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445292889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510684311] [2021-07-13 19:26:56,190 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 [2021-07-13 19:26:56,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:56,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510684311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:56,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:26:56,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104842369] [2021-07-13 19:26:56,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:56,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:56,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:56,288 INFO L87 Difference]: Start difference. First operand 20844 states and 88639 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) [2021-07-13 19:26:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:57,169 INFO L93 Difference]: Finished difference Result 44495 states and 179467 transitions. [2021-07-13 19:26:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:26:57,170 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 29 [2021-07-13 19:26:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:57,330 INFO L225 Difference]: With dead ends: 44495 [2021-07-13 19:26:57,331 INFO L226 Difference]: Without dead ends: 44495 [2021-07-13 19:26:57,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:26:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44495 states. [2021-07-13 19:26:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44495 to 20105. [2021-07-13 19:26:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20105 states, 20104 states have (on average 4.225875447672105) internal successors, (84957), 20104 states have internal predecessors, (84957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20105 states to 20105 states and 84957 transitions. [2021-07-13 19:26:58,294 INFO L78 Accepts]: Start accepts. Automaton has 20105 states and 84957 transitions. Word has length 29 [2021-07-13 19:26:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:58,294 INFO L482 AbstractCegarLoop]: Abstraction has 20105 states and 84957 transitions. [2021-07-13 19:26:58,295 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) [2021-07-13 19:26:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20105 states and 84957 transitions. [2021-07-13 19:26:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:58,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:58,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:58,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:26:58,540 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:58,540 INFO L82 PathProgramCache]: Analyzing trace with hash 150786821, now seen corresponding path program 27 times [2021-07-13 19:26:58,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:58,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5004768] [2021-07-13 19:26:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:58,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:58,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5004768] [2021-07-13 19:26:58,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5004768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663156040] [2021-07-13 19:26:58,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:58,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:26:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:26:58,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:58,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663156040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:58,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:26:58,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760535151] [2021-07-13 19:26:58,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:58,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:58,683 INFO L87 Difference]: Start difference. First operand 20105 states and 84957 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:59,252 INFO L93 Difference]: Finished difference Result 29398 states and 116855 transitions. [2021-07-13 19:26:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:26:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:59,488 INFO L225 Difference]: With dead ends: 29398 [2021-07-13 19:26:59,488 INFO L226 Difference]: Without dead ends: 29314 [2021-07-13 19:26:59,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29314 states. [2021-07-13 19:26:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29314 to 19357. [2021-07-13 19:26:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19357 states, 19356 states have (on average 4.232434387270097) internal successors, (81923), 19356 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19357 states to 19357 states and 81923 transitions. [2021-07-13 19:27:00,089 INFO L78 Accepts]: Start accepts. Automaton has 19357 states and 81923 transitions. Word has length 29 [2021-07-13 19:27:00,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:00,089 INFO L482 AbstractCegarLoop]: Abstraction has 19357 states and 81923 transitions. [2021-07-13 19:27:00,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 19357 states and 81923 transitions. [2021-07-13 19:27:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:00,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:00,129 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:00,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:27:00,330 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash -318156223, now seen corresponding path program 28 times [2021-07-13 19:27:00,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:00,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431651794] [2021-07-13 19:27:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:00,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431651794] [2021-07-13 19:27:00,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431651794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387516867] [2021-07-13 19:27:00,355 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:00,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:00,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:00,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:00,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387516867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:00,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:27:00,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081314855] [2021-07-13 19:27:00,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:00,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:00,454 INFO L87 Difference]: Start difference. First operand 19357 states and 81923 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:01,004 INFO L93 Difference]: Finished difference Result 39779 states and 158195 transitions. [2021-07-13 19:27:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:27:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:27:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:01,307 INFO L225 Difference]: With dead ends: 39779 [2021-07-13 19:27:01,307 INFO L226 Difference]: Without dead ends: 39779 [2021-07-13 19:27:01,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:27:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-07-13 19:27:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 20557. [2021-07-13 19:27:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20557 states, 20556 states have (on average 4.262502432379841) internal successors, (87620), 20556 states have internal predecessors, (87620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20557 states to 20557 states and 87620 transitions. [2021-07-13 19:27:01,970 INFO L78 Accepts]: Start accepts. Automaton has 20557 states and 87620 transitions. Word has length 29 [2021-07-13 19:27:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:01,970 INFO L482 AbstractCegarLoop]: Abstraction has 20557 states and 87620 transitions. [2021-07-13 19:27:01,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 20557 states and 87620 transitions. [2021-07-13 19:27:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:02,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:02,013 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:02,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:27:02,214 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1825756479, now seen corresponding path program 29 times [2021-07-13 19:27:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:02,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248275367] [2021-07-13 19:27:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:02,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:02,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248275367] [2021-07-13 19:27:02,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248275367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587152047] [2021-07-13 19:27:02,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:02,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:27:02,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:02,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:02,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587152047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:02,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:27:02,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568281420] [2021-07-13 19:27:02,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:02,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:02,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:02,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:02,345 INFO L87 Difference]: Start difference. First operand 20557 states and 87620 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-07-13 19:27:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:02,996 INFO L93 Difference]: Finished difference Result 27775 states and 112554 transitions. [2021-07-13 19:27:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29 [2021-07-13 19:27:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:03,106 INFO L225 Difference]: With dead ends: 27775 [2021-07-13 19:27:03,106 INFO L226 Difference]: Without dead ends: 27747 [2021-07-13 19:27:03,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:27:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27747 states. [2021-07-13 19:27:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27747 to 20546. [2021-07-13 19:27:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20546 states, 20545 states have (on average 4.26186420053541) internal successors, (87560), 20545 states have internal predecessors, (87560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20546 states to 20546 states and 87560 transitions. [2021-07-13 19:27:03,814 INFO L78 Accepts]: Start accepts. Automaton has 20546 states and 87560 transitions. Word has length 29 [2021-07-13 19:27:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:03,815 INFO L482 AbstractCegarLoop]: Abstraction has 20546 states and 87560 transitions. [2021-07-13 19:27:03,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-07-13 19:27:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20546 states and 87560 transitions. [2021-07-13 19:27:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:03,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:03,865 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:04,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:04,094 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1410258237, now seen corresponding path program 30 times [2021-07-13 19:27:04,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:04,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648577143] [2021-07-13 19:27:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:04,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:04,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648577143] [2021-07-13 19:27:04,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648577143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:04,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947670759] [2021-07-13 19:27:04,129 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:04,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:27:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:04,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:04,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947670759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:04,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:04,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:27:04,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482797707] [2021-07-13 19:27:04,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:04,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:04,225 INFO L87 Difference]: Start difference. First operand 20546 states and 87560 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:04,975 INFO L93 Difference]: Finished difference Result 31505 states and 127549 transitions. [2021-07-13 19:27:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:27:04,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:27:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:05,082 INFO L225 Difference]: With dead ends: 31505 [2021-07-13 19:27:05,082 INFO L226 Difference]: Without dead ends: 31505 [2021-07-13 19:27:05,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31505 states. [2021-07-13 19:27:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31505 to 20639. [2021-07-13 19:27:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.2605388119003775) internal successors, (87929), 20638 states have internal predecessors, (87929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87929 transitions. [2021-07-13 19:27:05,728 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87929 transitions. Word has length 29 [2021-07-13 19:27:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:05,728 INFO L482 AbstractCegarLoop]: Abstraction has 20639 states and 87929 transitions. [2021-07-13 19:27:05,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87929 transitions. [2021-07-13 19:27:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:05,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:05,771 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:05,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 19:27:05,972 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1856869113, now seen corresponding path program 31 times [2021-07-13 19:27:05,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:05,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195454008] [2021-07-13 19:27:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:06,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:06,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195454008] [2021-07-13 19:27:06,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195454008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119474629] [2021-07-13 19:27:06,002 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:06,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:06,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:06,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119474629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:06,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:06,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:27:06,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940337039] [2021-07-13 19:27:06,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:06,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:06,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:06,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:06,086 INFO L87 Difference]: Start difference. First operand 20639 states and 87929 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:06,765 INFO L93 Difference]: Finished difference Result 38173 states and 150936 transitions. [2021-07-13 19:27:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:27:06,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:27:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:06,901 INFO L225 Difference]: With dead ends: 38173 [2021-07-13 19:27:06,901 INFO L226 Difference]: Without dead ends: 38153 [2021-07-13 19:27:06,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:27:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38153 states. [2021-07-13 19:27:07,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38153 to 20639. [2021-07-13 19:27:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.260054268824499) internal successors, (87919), 20638 states have internal predecessors, (87919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87919 transitions. [2021-07-13 19:27:07,640 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87919 transitions. Word has length 29 [2021-07-13 19:27:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:07,640 INFO L482 AbstractCegarLoop]: Abstraction has 20639 states and 87919 transitions. [2021-07-13 19:27:07,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87919 transitions. [2021-07-13 19:27:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:07,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:07,694 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:07,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:07,913 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:07,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1141511809, now seen corresponding path program 32 times [2021-07-13 19:27:07,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:07,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183656027] [2021-07-13 19:27:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:07,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:07,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183656027] [2021-07-13 19:27:07,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183656027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:07,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877812100] [2021-07-13 19:27:07,960 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:07,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:07,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:08,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877812100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:08,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:08,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:27:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060428273] [2021-07-13 19:27:08,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:08,063 INFO L87 Difference]: Start difference. First operand 20639 states and 87919 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:09,610 INFO L93 Difference]: Finished difference Result 44621 states and 181666 transitions. [2021-07-13 19:27:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:27:09,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:27:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:09,797 INFO L225 Difference]: With dead ends: 44621 [2021-07-13 19:27:09,798 INFO L226 Difference]: Without dead ends: 44621 [2021-07-13 19:27:09,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:27:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44621 states. [2021-07-13 19:27:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44621 to 21011. [2021-07-13 19:27:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 4.254878629224179) internal successors, (89395), 21010 states have internal predecessors, (89395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 89395 transitions. [2021-07-13 19:27:10,584 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 89395 transitions. Word has length 29 [2021-07-13 19:27:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:10,584 INFO L482 AbstractCegarLoop]: Abstraction has 21011 states and 89395 transitions. [2021-07-13 19:27:10,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 89395 transitions. [2021-07-13 19:27:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:10,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:10,630 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:10,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:10,831 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash -693734177, now seen corresponding path program 33 times [2021-07-13 19:27:10,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:10,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431952449] [2021-07-13 19:27:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:10,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:10,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431952449] [2021-07-13 19:27:10,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431952449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:10,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835717188] [2021-07-13 19:27:10,854 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:10,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:27:10,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:10,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835717188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:10,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:10,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:27:10,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292554335] [2021-07-13 19:27:10,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:10,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:10,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:10,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:10,957 INFO L87 Difference]: Start difference. First operand 21011 states and 89395 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:11,753 INFO L93 Difference]: Finished difference Result 44719 states and 175059 transitions. [2021-07-13 19:27:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:27:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:27:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:11,902 INFO L225 Difference]: With dead ends: 44719 [2021-07-13 19:27:11,902 INFO L226 Difference]: Without dead ends: 44519 [2021-07-13 19:27:11,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:27:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44519 states. [2021-07-13 19:27:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44519 to 21017. [2021-07-13 19:27:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 21016 states have (on average 4.253235629996193) internal successors, (89386), 21016 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 89386 transitions. [2021-07-13 19:27:12,706 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 89386 transitions. Word has length 29 [2021-07-13 19:27:12,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:12,706 INFO L482 AbstractCegarLoop]: Abstraction has 21017 states and 89386 transitions. [2021-07-13 19:27:12,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 89386 transitions. [2021-07-13 19:27:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:12,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:12,903 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:13,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:13,120 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1091822909, now seen corresponding path program 34 times [2021-07-13 19:27:13,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:13,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648954213] [2021-07-13 19:27:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:13,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:13,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648954213] [2021-07-13 19:27:13,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648954213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:13,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559302521] [2021-07-13 19:27:13,150 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:13,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:13,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:13,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559302521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:13,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:13,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:27:13,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460785406] [2021-07-13 19:27:13,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:13,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:13,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:13,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:13,250 INFO L87 Difference]: Start difference. First operand 21017 states and 89386 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:14,507 INFO L93 Difference]: Finished difference Result 38364 states and 158236 transitions. [2021-07-13 19:27:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:27:14,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:27:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:14,659 INFO L225 Difference]: With dead ends: 38364 [2021-07-13 19:27:14,659 INFO L226 Difference]: Without dead ends: 38344 [2021-07-13 19:27:14,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:27:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38344 states. [2021-07-13 19:27:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38344 to 21400. [2021-07-13 19:27:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21400 states, 21399 states have (on average 4.237441001915977) internal successors, (90677), 21399 states have internal predecessors, (90677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21400 states to 21400 states and 90677 transitions. [2021-07-13 19:27:15,364 INFO L78 Accepts]: Start accepts. Automaton has 21400 states and 90677 transitions. Word has length 29 [2021-07-13 19:27:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:15,364 INFO L482 AbstractCegarLoop]: Abstraction has 21400 states and 90677 transitions. [2021-07-13 19:27:15,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 21400 states and 90677 transitions. [2021-07-13 19:27:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:15,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:15,412 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:15,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:15,613 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash -897665189, now seen corresponding path program 35 times [2021-07-13 19:27:15,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:15,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374870071] [2021-07-13 19:27:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:15,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:15,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374870071] [2021-07-13 19:27:15,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374870071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:15,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020533291] [2021-07-13 19:27:15,653 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:15,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:27:15,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:15,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020533291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:15,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:15,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:27:15,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540884677] [2021-07-13 19:27:15,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:15,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:15,742 INFO L87 Difference]: Start difference. First operand 21400 states and 90677 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:16,483 INFO L93 Difference]: Finished difference Result 37284 states and 146566 transitions. [2021-07-13 19:27:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:27:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:27:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:16,615 INFO L225 Difference]: With dead ends: 37284 [2021-07-13 19:27:16,615 INFO L226 Difference]: Without dead ends: 37184 [2021-07-13 19:27:16,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:27:16,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37184 states. [2021-07-13 19:27:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37184 to 21702. [2021-07-13 19:27:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21702 states, 21701 states have (on average 4.22432145984056) internal successors, (91672), 21701 states have internal predecessors, (91672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21702 states to 21702 states and 91672 transitions. [2021-07-13 19:27:17,376 INFO L78 Accepts]: Start accepts. Automaton has 21702 states and 91672 transitions. Word has length 29 [2021-07-13 19:27:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:17,376 INFO L482 AbstractCegarLoop]: Abstraction has 21702 states and 91672 transitions. [2021-07-13 19:27:17,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 21702 states and 91672 transitions. [2021-07-13 19:27:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:17,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:17,425 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:17,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 19:27:17,626 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:17,626 INFO L82 PathProgramCache]: Analyzing trace with hash -430337555, now seen corresponding path program 16 times [2021-07-13 19:27:17,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:17,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581192223] [2021-07-13 19:27:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:17,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:17,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581192223] [2021-07-13 19:27:17,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581192223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:17,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763459218] [2021-07-13 19:27:17,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:27:17,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:17,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:17,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:17,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763459218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:17,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:17,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:27:17,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678297525] [2021-07-13 19:27:17,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:17,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:17,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:17,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:17,899 INFO L87 Difference]: Start difference. First operand 21702 states and 91672 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) [2021-07-13 19:27:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:19,271 INFO L93 Difference]: Finished difference Result 62502 states and 262210 transitions. [2021-07-13 19:27:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:27:19,271 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 29 [2021-07-13 19:27:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:19,539 INFO L225 Difference]: With dead ends: 62502 [2021-07-13 19:27:19,540 INFO L226 Difference]: Without dead ends: 62502 [2021-07-13 19:27:19,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:27:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62502 states. [2021-07-13 19:27:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62502 to 25980. [2021-07-13 19:27:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25980 states, 25979 states have (on average 4.299280187844028) internal successors, (111691), 25979 states have internal predecessors, (111691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25980 states to 25980 states and 111691 transitions. [2021-07-13 19:27:20,711 INFO L78 Accepts]: Start accepts. Automaton has 25980 states and 111691 transitions. Word has length 29 [2021-07-13 19:27:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:20,711 INFO L482 AbstractCegarLoop]: Abstraction has 25980 states and 111691 transitions. [2021-07-13 19:27:20,711 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) [2021-07-13 19:27:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 25980 states and 111691 transitions. [2021-07-13 19:27:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:20,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:20,772 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:20,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:20,973 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1857191571, now seen corresponding path program 17 times [2021-07-13 19:27:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:20,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962731648] [2021-07-13 19:27:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:21,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:21,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962731648] [2021-07-13 19:27:21,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962731648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:21,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039206493] [2021-07-13 19:27:21,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:21,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:27:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:21,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039206493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:21,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:21,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:27:21,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310408965] [2021-07-13 19:27:21,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:21,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:21,093 INFO L87 Difference]: Start difference. First operand 25980 states and 111691 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) [2021-07-13 19:27:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:21,945 INFO L93 Difference]: Finished difference Result 55112 states and 227311 transitions. [2021-07-13 19:27:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:27:21,945 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 29 [2021-07-13 19:27:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:22,192 INFO L225 Difference]: With dead ends: 55112 [2021-07-13 19:27:22,193 INFO L226 Difference]: Without dead ends: 54872 [2021-07-13 19:27:22,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:27:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54872 states. [2021-07-13 19:27:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54872 to 34226. [2021-07-13 19:27:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34226 states, 34225 states have (on average 4.397428780131483) internal successors, (150502), 34225 states have internal predecessors, (150502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34226 states to 34226 states and 150502 transitions. [2021-07-13 19:27:23,432 INFO L78 Accepts]: Start accepts. Automaton has 34226 states and 150502 transitions. Word has length 29 [2021-07-13 19:27:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:23,432 INFO L482 AbstractCegarLoop]: Abstraction has 34226 states and 150502 transitions. [2021-07-13 19:27:23,432 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) [2021-07-13 19:27:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34226 states and 150502 transitions. [2021-07-13 19:27:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:23,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:23,516 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:23,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:27:23,717 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1149024621, now seen corresponding path program 18 times [2021-07-13 19:27:23,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:23,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120177717] [2021-07-13 19:27:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:23,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120177717] [2021-07-13 19:27:23,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120177717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52941456] [2021-07-13 19:27:23,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:23,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:27:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:23,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:23,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52941456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:23,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:23,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:27:23,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691239637] [2021-07-13 19:27:23,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:27:23,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:23,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:27:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:27:23,831 INFO L87 Difference]: Start difference. First operand 34226 states and 150502 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) [2021-07-13 19:27:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:24,595 INFO L93 Difference]: Finished difference Result 55218 states and 230451 transitions. [2021-07-13 19:27:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:24,595 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 29 [2021-07-13 19:27:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:24,815 INFO L225 Difference]: With dead ends: 55218 [2021-07-13 19:27:24,815 INFO L226 Difference]: Without dead ends: 55218 [2021-07-13 19:27:24,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:27:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55218 states. [2021-07-13 19:27:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55218 to 33975. [2021-07-13 19:27:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33975 states, 33974 states have (on average 4.384441043150645) internal successors, (148957), 33974 states have internal predecessors, (148957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33975 states to 33975 states and 148957 transitions. [2021-07-13 19:27:26,105 INFO L78 Accepts]: Start accepts. Automaton has 33975 states and 148957 transitions. Word has length 29 [2021-07-13 19:27:26,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:26,105 INFO L482 AbstractCegarLoop]: Abstraction has 33975 states and 148957 transitions. [2021-07-13 19:27:26,105 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) [2021-07-13 19:27:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 33975 states and 148957 transitions. [2021-07-13 19:27:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:26,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:26,188 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:26,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:26,389 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1358085157, now seen corresponding path program 19 times [2021-07-13 19:27:26,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:26,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560788359] [2021-07-13 19:27:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:26,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:26,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560788359] [2021-07-13 19:27:26,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560788359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:26,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827171798] [2021-07-13 19:27:26,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:26,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827171798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:26,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:26,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:27:26,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704870267] [2021-07-13 19:27:26,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:27:26,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:27:26,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:27:26,498 INFO L87 Difference]: Start difference. First operand 33975 states and 148957 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) [2021-07-13 19:27:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:27,225 INFO L93 Difference]: Finished difference Result 43486 states and 183757 transitions. [2021-07-13 19:27:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:27:27,226 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 29 [2021-07-13 19:27:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:27,382 INFO L225 Difference]: With dead ends: 43486 [2021-07-13 19:27:27,383 INFO L226 Difference]: Without dead ends: 43461 [2021-07-13 19:27:27,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:27:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43461 states. [2021-07-13 19:27:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43461 to 34031. [2021-07-13 19:27:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34031 states, 34030 states have (on average 4.383338230972671) internal successors, (149165), 34030 states have internal predecessors, (149165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34031 states to 34031 states and 149165 transitions. [2021-07-13 19:27:28,588 INFO L78 Accepts]: Start accepts. Automaton has 34031 states and 149165 transitions. Word has length 29 [2021-07-13 19:27:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:28,588 INFO L482 AbstractCegarLoop]: Abstraction has 34031 states and 149165 transitions. [2021-07-13 19:27:28,588 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) [2021-07-13 19:27:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 34031 states and 149165 transitions. [2021-07-13 19:27:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:28,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:28,672 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:28,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:28,872 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash -488972063, now seen corresponding path program 20 times [2021-07-13 19:27:28,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:28,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144687961] [2021-07-13 19:27:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:28,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:28,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144687961] [2021-07-13 19:27:28,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144687961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:28,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294527154] [2021-07-13 19:27:28,897 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:28,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:28,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:28,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294527154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:28,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:28,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:27:28,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645255862] [2021-07-13 19:27:28,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:28,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:28,993 INFO L87 Difference]: Start difference. First operand 34031 states and 149165 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) [2021-07-13 19:27:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:30,247 INFO L93 Difference]: Finished difference Result 91021 states and 382461 transitions. [2021-07-13 19:27:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:27:30,247 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 29 [2021-07-13 19:27:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:30,722 INFO L225 Difference]: With dead ends: 91021 [2021-07-13 19:27:30,722 INFO L226 Difference]: Without dead ends: 91021 [2021-07-13 19:27:30,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91021 states. [2021-07-13 19:27:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91021 to 37194. [2021-07-13 19:27:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.447261581480386) internal successors, (165407), 37193 states have internal predecessors, (165407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165407 transitions. [2021-07-13 19:27:32,482 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165407 transitions. Word has length 29 [2021-07-13 19:27:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:32,482 INFO L482 AbstractCegarLoop]: Abstraction has 37194 states and 165407 transitions. [2021-07-13 19:27:32,482 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) [2021-07-13 19:27:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165407 transitions. [2021-07-13 19:27:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:32,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:32,871 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:33,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:33,089 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash -726935455, now seen corresponding path program 21 times [2021-07-13 19:27:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:33,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078116857] [2021-07-13 19:27:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:33,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:33,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078116857] [2021-07-13 19:27:33,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078116857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:33,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890505671] [2021-07-13 19:27:33,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:33,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:27:33,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:33,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:33,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890505671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:33,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:33,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:27:33,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029771014] [2021-07-13 19:27:33,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:33,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:33,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:33,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:33,211 INFO L87 Difference]: Start difference. First operand 37194 states and 165407 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) [2021-07-13 19:27:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:34,327 INFO L93 Difference]: Finished difference Result 65131 states and 273960 transitions. [2021-07-13 19:27:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:27:34,328 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 29 [2021-07-13 19:27:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:34,622 INFO L225 Difference]: With dead ends: 65131 [2021-07-13 19:27:34,622 INFO L226 Difference]: Without dead ends: 65083 [2021-07-13 19:27:34,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2021-07-13 19:27:35,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 37194. [2021-07-13 19:27:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.446938940123141) internal successors, (165395), 37193 states have internal predecessors, (165395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165395 transitions. [2021-07-13 19:27:36,058 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165395 transitions. Word has length 29 [2021-07-13 19:27:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:36,058 INFO L482 AbstractCegarLoop]: Abstraction has 37194 states and 165395 transitions. [2021-07-13 19:27:36,058 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) [2021-07-13 19:27:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165395 transitions. [2021-07-13 19:27:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:36,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:36,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:36,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:36,351 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1887535201, now seen corresponding path program 22 times [2021-07-13 19:27:36,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:36,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131715343] [2021-07-13 19:27:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:36,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:36,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131715343] [2021-07-13 19:27:36,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131715343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:36,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622727600] [2021-07-13 19:27:36,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:36,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:36,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:36,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:36,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622727600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:36,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:36,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:27:36,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433236670] [2021-07-13 19:27:36,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:36,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:36,476 INFO L87 Difference]: Start difference. First operand 37194 states and 165395 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) [2021-07-13 19:27:37,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:37,902 INFO L93 Difference]: Finished difference Result 80813 states and 340534 transitions. [2021-07-13 19:27:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:27:37,902 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 29 [2021-07-13 19:27:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:38,304 INFO L225 Difference]: With dead ends: 80813 [2021-07-13 19:27:38,304 INFO L226 Difference]: Without dead ends: 80813 [2021-07-13 19:27:38,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:27:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80813 states. [2021-07-13 19:27:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80813 to 37432. [2021-07-13 19:27:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445646656514653) internal successors, (166405), 37431 states have internal predecessors, (166405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166405 transitions. [2021-07-13 19:27:39,906 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166405 transitions. Word has length 29 [2021-07-13 19:27:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:39,906 INFO L482 AbstractCegarLoop]: Abstraction has 37432 states and 166405 transitions. [2021-07-13 19:27:39,906 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) [2021-07-13 19:27:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166405 transitions. [2021-07-13 19:27:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:27:39,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:39,999 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:40,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 19:27:40,200 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:40,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2096595737, now seen corresponding path program 23 times [2021-07-13 19:27:40,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:40,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255919974] [2021-07-13 19:27:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:40,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:40,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255919974] [2021-07-13 19:27:40,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255919974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:40,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872270842] [2021-07-13 19:27:40,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:27:40,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:27:40,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:40,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:27:40,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:40,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872270842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:40,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:40,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-13 19:27:40,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444770573] [2021-07-13 19:27:40,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:27:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:27:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:27:40,327 INFO L87 Difference]: Start difference. First operand 37432 states and 166405 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) [2021-07-13 19:27:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:41,290 INFO L93 Difference]: Finished difference Result 70173 states and 294528 transitions. [2021-07-13 19:27:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:41,290 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 29 [2021-07-13 19:27:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:41,871 INFO L225 Difference]: With dead ends: 70173 [2021-07-13 19:27:41,872 INFO L226 Difference]: Without dead ends: 70123 [2021-07-13 19:27:41,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:27:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70123 states. [2021-07-13 19:27:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70123 to 37432.