/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 04:47:55,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 04:47:55,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 04:47:55,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 04:47:55,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 04:47:55,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 04:47:55,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 04:47:55,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 04:47:55,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 04:47:55,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 04:47:55,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 04:47:55,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 04:47:55,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 04:47:55,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 04:47:55,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 04:47:55,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 04:47:55,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 04:47:55,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 04:47:55,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 04:47:55,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 04:47:55,546 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 [2021-04-15 04:47:55,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 04:47:55,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 04:47:55,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 04:47:55,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 04:47:55,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 04:47:55,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 04:47:55,600 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 04:47:55,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 04:47:55,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 04:47:55,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 04:47:55,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 04:47:55,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 04:47:55,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 04:47:55,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 04:47:55,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 04:47:55,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 04:47:55,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 04:47:55,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 04:47:55,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 04:47:55,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 04:47:55,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 04:47:55,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 04:47:55,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 04:47:55,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:47:55,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 04:47:55,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 04:47:55,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 04:47:55,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 04:47:55,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 04:47:55,604 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 04:47:55,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 04:47:55,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 04:47:56,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 04:47:56,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 04:47:56,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 04:47:56,095 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 04:47:56,097 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 04:47:56,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl [2021-04-15 04:47:56,098 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl' [2021-04-15 04:47:56,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 04:47:56,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 04:47:56,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 04:47:56,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 04:47:56,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 04:47:56,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 04:47:56,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 04:47:56,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 04:47:56,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 04:47:56,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/1) ... [2021-04-15 04:47:56,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 04:47:56,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 04:47:56,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 04:47:56,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 04:47:56,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (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 [2021-04-15 04:47:56,587 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 04:47:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 04:47:56,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 04:47:56,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 04:47:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 04:47:56,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 04:47:56,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 04:47:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 04:47:56,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 04:47:56,590 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 04:47:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 04:47:56,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 04:47:56,593 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 04:47:56,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 04:47:56,867 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 04:47:56,869 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:47:56 BoogieIcfgContainer [2021-04-15 04:47:56,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 04:47:56,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 04:47:56,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 04:47:56,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 04:47:56,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:47:56" (1/2) ... [2021-04-15 04:47:56,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25af8f8c and model type dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:47:56, skipping insertion in model container [2021-04-15 04:47:56,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:47:56" (2/2) ... [2021-04-15 04:47:56,894 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-array.wvr.bpl [2021-04-15 04:47:56,899 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 04:47:56,900 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 04:47:56,903 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 04:47:56,904 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 04:47:56,988 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 04:47:57,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 04:47:57,077 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 04:47:57,078 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 04:47:57,078 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 04:47:57,078 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 04:47:57,078 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 04:47:57,078 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 04:47:57,078 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 04:47:57,078 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 04:47:57,088 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-04-15 04:47:57,140 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 04:47:57,155 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:57,156 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:57,157 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:57,168 INFO L82 PathProgramCache]: Analyzing trace with hash 952922745, now seen corresponding path program 1 times [2021-04-15 04:47:57,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:57,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852624356] [2021-04-15 04:47:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:57,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852624356] [2021-04-15 04:47:57,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:47:57,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:47:57,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882387941] [2021-04-15 04:47:57,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:47:57,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:47:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:47:57,416 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:57,465 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-04-15 04:47:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:47:57,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 04:47:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:57,481 INFO L225 Difference]: With dead ends: 217 [2021-04-15 04:47:57,481 INFO L226 Difference]: Without dead ends: 202 [2021-04-15 04:47:57,482 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:47:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-04-15 04:47:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-04-15 04:47:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-04-15 04:47:57,542 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-04-15 04:47:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:57,543 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-04-15 04:47:57,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-04-15 04:47:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 04:47:57,551 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:57,551 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:57,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 04:47:57,552 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:57,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1603966247, now seen corresponding path program 1 times [2021-04-15 04:47:57,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:57,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103860418] [2021-04-15 04:47:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:47:57,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103860418] [2021-04-15 04:47:57,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:47:57,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 04:47:57,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417568826] [2021-04-15 04:47:57,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:47:57,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:47:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:47:57,662 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:57,730 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-04-15 04:47:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:47:57,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 04:47:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:57,735 INFO L225 Difference]: With dead ends: 158 [2021-04-15 04:47:57,735 INFO L226 Difference]: Without dead ends: 158 [2021-04-15 04:47:57,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:47:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-04-15 04:47:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-04-15 04:47:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-04-15 04:47:57,764 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-04-15 04:47:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:57,764 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-04-15 04:47:57,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-04-15 04:47:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 04:47:57,766 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:57,766 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:57,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 04:47:57,766 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:57,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:57,767 INFO L82 PathProgramCache]: Analyzing trace with hash 5118359, now seen corresponding path program 1 times [2021-04-15 04:47:57,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:57,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448166117] [2021-04-15 04:47:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:47:57,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448166117] [2021-04-15 04:47:57,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:47:57,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 04:47:57,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698927818] [2021-04-15 04:47:57,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 04:47:57,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:57,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 04:47:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:47:57,859 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:57,920 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-04-15 04:47:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:47:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 04:47:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:57,923 INFO L225 Difference]: With dead ends: 183 [2021-04-15 04:47:57,923 INFO L226 Difference]: Without dead ends: 183 [2021-04-15 04:47:57,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:47:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-04-15 04:47:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-04-15 04:47:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-04-15 04:47:57,934 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-04-15 04:47:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:57,934 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-04-15 04:47:57,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-04-15 04:47:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:47:57,936 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:57,936 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:57,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 04:47:57,936 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash -443909641, now seen corresponding path program 1 times [2021-04-15 04:47:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:57,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894355600] [2021-04-15 04:47:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:58,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894355600] [2021-04-15 04:47:58,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72821582] [2021-04-15 04:47:58,214 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 [2021-04-15 04:47:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:58,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:47:58,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:58,610 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-04-15 04:47:58,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 66 [2021-04-15 04:47:58,618 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:47:58,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:58,634 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-04-15 04:47:58,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2021-04-15 04:47:58,642 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:47:58,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:58,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-04-15 04:47:58,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:58,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:58,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:58,663 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:75, output treesize:3 [2021-04-15 04:47:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:58,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:58,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:47:58,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740535276] [2021-04-15 04:47:58,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:47:58,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:47:58,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:47:58,688 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 04:47:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:58,980 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-04-15 04:47:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:47:58,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 22 [2021-04-15 04:47:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:58,983 INFO L225 Difference]: With dead ends: 330 [2021-04-15 04:47:58,983 INFO L226 Difference]: Without dead ends: 315 [2021-04-15 04:47:58,983 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:47:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-04-15 04:47:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-04-15 04:47:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-04-15 04:47:58,995 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-04-15 04:47:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:58,995 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-04-15 04:47:58,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 04:47:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-04-15 04:47:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:47:58,997 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:58,997 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:59,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:59,217 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash -611718733, now seen corresponding path program 2 times [2021-04-15 04:47:59,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:59,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32187038] [2021-04-15 04:47:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32187038] [2021-04-15 04:47:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871013786] [2021-04-15 04:47:59,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:59,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:47:59,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:47:59,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:59,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:59,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 73 [2021-04-15 04:47:59,713 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:47:59,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:59,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:59,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-04-15 04:47:59,854 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:47:59,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:59,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:59,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2021-04-15 04:47:59,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-04-15 04:47:59,978 INFO L628 ElimStorePlain]: treesize reduction 35, result has 52.7 percent of original size [2021-04-15 04:47:59,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:47:59,993 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:21 [2021-04-15 04:48:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:00,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:00,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-04-15 04:48:00,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468601931] [2021-04-15 04:48:00,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:00,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:00,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:00,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:00,054 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-04-15 04:48:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:00,717 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-04-15 04:48:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:48:00,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-04-15 04:48:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:00,719 INFO L225 Difference]: With dead ends: 406 [2021-04-15 04:48:00,720 INFO L226 Difference]: Without dead ends: 391 [2021-04-15 04:48:00,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:48:00,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-04-15 04:48:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 229. [2021-04-15 04:48:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-04-15 04:48:00,732 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-04-15 04:48:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:00,732 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-04-15 04:48:00,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-04-15 04:48:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-04-15 04:48:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:48:00,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:00,734 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:48:00,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:00,955 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash -312945285, now seen corresponding path program 3 times [2021-04-15 04:48:00,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:00,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283268715] [2021-04-15 04:48:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:01,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283268715] [2021-04-15 04:48:01,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986513753] [2021-04-15 04:48:01,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:01,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:48:01,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:01,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 04:48:01,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:01,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-04-15 04:48:01,311 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:01,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:01,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-04-15 04:48:01,324 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:01,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:01,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-04-15 04:48:01,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:01,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:01,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:01,344 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-04-15 04:48:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:01,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:01,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 04:48:01,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280401297] [2021-04-15 04:48:01,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:48:01,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:48:01,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:48:01,377 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 04:48:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:01,575 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-04-15 04:48:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:48:01,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 22 [2021-04-15 04:48:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:01,578 INFO L225 Difference]: With dead ends: 363 [2021-04-15 04:48:01,578 INFO L226 Difference]: Without dead ends: 348 [2021-04-15 04:48:01,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:48:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-04-15 04:48:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-04-15 04:48:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-04-15 04:48:01,593 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-04-15 04:48:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:01,594 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-04-15 04:48:01,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 04:48:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-04-15 04:48:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:48:01,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:01,605 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:48:01,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:01,821 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:01,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1257880315, now seen corresponding path program 4 times [2021-04-15 04:48:01,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:01,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347160832] [2021-04-15 04:48:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:01,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347160832] [2021-04-15 04:48:01,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873677604] [2021-04-15 04:48:01,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:02,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:02,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:48:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:02,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:02,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 73 [2021-04-15 04:48:02,239 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:02,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:02,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:02,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-04-15 04:48:02,361 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:02,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:02,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:02,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2021-04-15 04:48:02,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-04-15 04:48:02,469 INFO L628 ElimStorePlain]: treesize reduction 35, result has 53.9 percent of original size [2021-04-15 04:48:02,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:48:02,488 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:82, output treesize:21 [2021-04-15 04:48:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:02,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:02,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:48:02,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577222800] [2021-04-15 04:48:02,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:02,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:02,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:02,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:02,552 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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) [2021-04-15 04:48:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:02,915 INFO L93 Difference]: Finished difference Result 429 states and 1249 transitions. [2021-04-15 04:48:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:48:02,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 22 [2021-04-15 04:48:02,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:02,922 INFO L225 Difference]: With dead ends: 429 [2021-04-15 04:48:02,922 INFO L226 Difference]: Without dead ends: 414 [2021-04-15 04:48:02,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:48:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-04-15 04:48:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 247. [2021-04-15 04:48:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-04-15 04:48:02,933 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-04-15 04:48:02,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:02,935 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-04-15 04:48:02,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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) [2021-04-15 04:48:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-04-15 04:48:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:02,937 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:02,937 INFO L551 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] [2021-04-15 04:48:03,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:03,161 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1884155861, now seen corresponding path program 5 times [2021-04-15 04:48:03,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:03,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745429382] [2021-04-15 04:48:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:03,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745429382] [2021-04-15 04:48:03,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257688170] [2021-04-15 04:48:03,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:03,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:48:03,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:03,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:03,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:48:03,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020876698] [2021-04-15 04:48:03,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:48:03,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:03,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:48:03,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:48:03,405 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-04-15 04:48:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:03,879 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-04-15 04:48:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:48:03,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-04-15 04:48:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:03,884 INFO L225 Difference]: With dead ends: 619 [2021-04-15 04:48:03,884 INFO L226 Difference]: Without dead ends: 619 [2021-04-15 04:48:03,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:48:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-04-15 04:48:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-04-15 04:48:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-04-15 04:48:03,899 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-04-15 04:48:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:03,899 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-04-15 04:48:03,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-04-15 04:48:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-04-15 04:48:03,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:03,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:03,901 INFO L551 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] [2021-04-15 04:48:04,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 04:48:04,113 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash 907837017, now seen corresponding path program 6 times [2021-04-15 04:48:04,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:04,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683394225] [2021-04-15 04:48:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:04,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683394225] [2021-04-15 04:48:04,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350563558] [2021-04-15 04:48:04,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:04,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:48:04,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:04,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:04,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:04,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280540168] [2021-04-15 04:48:04,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:04,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:04,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:04,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:04,298 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:05,169 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-04-15 04:48:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 04:48:05,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 04:48:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:05,187 INFO L225 Difference]: With dead ends: 1078 [2021-04-15 04:48:05,187 INFO L226 Difference]: Without dead ends: 1078 [2021-04-15 04:48:05,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:48:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-04-15 04:48:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-04-15 04:48:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-04-15 04:48:05,211 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-04-15 04:48:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:05,211 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-04-15 04:48:05,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-04-15 04:48:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:05,214 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:05,214 INFO L551 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] [2021-04-15 04:48:05,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 04:48:05,429 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:05,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1474789097, now seen corresponding path program 7 times [2021-04-15 04:48:05,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:05,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141431117] [2021-04-15 04:48:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141431117] [2021-04-15 04:48:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271454211] [2021-04-15 04:48:05,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:05,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:05,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:05,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:05,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:05,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942912175] [2021-04-15 04:48:05,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:05,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:05,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:05,626 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:06,366 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-04-15 04:48:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:48:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 04:48:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:06,371 INFO L225 Difference]: With dead ends: 951 [2021-04-15 04:48:06,371 INFO L226 Difference]: Without dead ends: 951 [2021-04-15 04:48:06,372 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:48:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-04-15 04:48:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-04-15 04:48:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-04-15 04:48:06,385 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-04-15 04:48:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:06,386 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-04-15 04:48:06,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-04-15 04:48:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:06,387 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:06,387 INFO L551 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] [2021-04-15 04:48:06,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 04:48:06,600 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1884039527, now seen corresponding path program 1 times [2021-04-15 04:48:06,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:06,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426712114] [2021-04-15 04:48:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:48:06,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426712114] [2021-04-15 04:48:06,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718850188] [2021-04-15 04:48:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:06,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:48:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:48:06,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:06,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 04:48:06,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890050167] [2021-04-15 04:48:06,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 04:48:06,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:06,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 04:48:06,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:48:06,762 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:06,899 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-04-15 04:48:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:48:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:06,906 INFO L225 Difference]: With dead ends: 669 [2021-04-15 04:48:06,906 INFO L226 Difference]: Without dead ends: 663 [2021-04-15 04:48:06,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-04-15 04:48:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-04-15 04:48:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-04-15 04:48:06,925 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-04-15 04:48:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:06,925 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-04-15 04:48:06,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-04-15 04:48:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:06,930 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:06,930 INFO L551 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] [2021-04-15 04:48:07,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-15 04:48:07,141 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1973959061, now seen corresponding path program 8 times [2021-04-15 04:48:07,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:07,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019311990] [2021-04-15 04:48:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:07,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019311990] [2021-04-15 04:48:07,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299522644] [2021-04-15 04:48:07,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:07,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:07,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:07,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:07,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:07,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 04:48:07,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824900564] [2021-04-15 04:48:07,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:07,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:07,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:07,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:07,368 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-04-15 04:48:07,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:07,601 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-04-15 04:48:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:48:07,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-04-15 04:48:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:07,605 INFO L225 Difference]: With dead ends: 710 [2021-04-15 04:48:07,606 INFO L226 Difference]: Without dead ends: 672 [2021-04-15 04:48:07,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:48:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-04-15 04:48:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-04-15 04:48:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-04-15 04:48:07,625 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-04-15 04:48:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:07,625 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-04-15 04:48:07,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-04-15 04:48:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-04-15 04:48:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:07,627 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:07,627 INFO L551 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] [2021-04-15 04:48:07,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:07,828 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:07,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1268001729, now seen corresponding path program 2 times [2021-04-15 04:48:07,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:07,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383221658] [2021-04-15 04:48:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:48:07,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383221658] [2021-04-15 04:48:07,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777106845] [2021-04-15 04:48:07,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:48:07,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:48:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:48:07,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:07,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 04:48:07,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012581632] [2021-04-15 04:48:07,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 04:48:07,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 04:48:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:48:07,986 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:08,108 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-04-15 04:48:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:48:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:08,113 INFO L225 Difference]: With dead ends: 830 [2021-04-15 04:48:08,114 INFO L226 Difference]: Without dead ends: 830 [2021-04-15 04:48:08,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-04-15 04:48:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-04-15 04:48:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-04-15 04:48:08,148 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-04-15 04:48:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:08,148 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-04-15 04:48:08,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-04-15 04:48:08,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:08,150 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:08,150 INFO L551 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] [2021-04-15 04:48:08,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:08,365 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash -78679837, now seen corresponding path program 9 times [2021-04-15 04:48:08,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:08,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524252058] [2021-04-15 04:48:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:08,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524252058] [2021-04-15 04:48:08,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141064867] [2021-04-15 04:48:08,422 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 [2021-04-15 04:48:08,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:48:08,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:08,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:08,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:08,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:08,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:48:08,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96162835] [2021-04-15 04:48:08,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:48:08,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:08,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:48:08,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:48:08,551 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-04-15 04:48:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:08,895 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-04-15 04:48:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 04:48:08,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-04-15 04:48:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:08,902 INFO L225 Difference]: With dead ends: 1196 [2021-04-15 04:48:08,903 INFO L226 Difference]: Without dead ends: 1196 [2021-04-15 04:48:08,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:48:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-04-15 04:48:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-04-15 04:48:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-04-15 04:48:08,933 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-04-15 04:48:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:08,933 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-04-15 04:48:08,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-04-15 04:48:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-04-15 04:48:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:08,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:08,936 INFO L551 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] [2021-04-15 04:48:09,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-04-15 04:48:09,161 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash 706234257, now seen corresponding path program 10 times [2021-04-15 04:48:09,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:09,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431170041] [2021-04-15 04:48:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:09,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431170041] [2021-04-15 04:48:09,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132603017] [2021-04-15 04:48:09,207 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 [2021-04-15 04:48:09,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:09,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:09,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:09,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:48:09,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626566457] [2021-04-15 04:48:09,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:48:09,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:48:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:48:09,338 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-04-15 04:48:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:09,835 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-04-15 04:48:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:48:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-04-15 04:48:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:09,843 INFO L225 Difference]: With dead ends: 1492 [2021-04-15 04:48:09,844 INFO L226 Difference]: Without dead ends: 1492 [2021-04-15 04:48:09,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:48:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-04-15 04:48:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-04-15 04:48:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-04-15 04:48:09,881 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-04-15 04:48:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:09,881 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-04-15 04:48:09,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-04-15 04:48:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-04-15 04:48:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:09,883 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:09,883 INFO L551 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] [2021-04-15 04:48:10,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:10,097 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash -376788399, now seen corresponding path program 11 times [2021-04-15 04:48:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:10,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748544266] [2021-04-15 04:48:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:10,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748544266] [2021-04-15 04:48:10,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358045407] [2021-04-15 04:48:10,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:48:10,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:10,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:10,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:10,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 04:48:10,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968287268] [2021-04-15 04:48:10,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:10,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:10,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:10,272 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-04-15 04:48:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:10,545 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-04-15 04:48:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:48:10,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 24 [2021-04-15 04:48:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:10,550 INFO L225 Difference]: With dead ends: 1258 [2021-04-15 04:48:10,551 INFO L226 Difference]: Without dead ends: 1248 [2021-04-15 04:48:10,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:48:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-04-15 04:48:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-04-15 04:48:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-04-15 04:48:10,589 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-04-15 04:48:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:10,590 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-04-15 04:48:10,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-04-15 04:48:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-04-15 04:48:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:10,596 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:10,596 INFO L551 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] [2021-04-15 04:48:10,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 04:48:10,809 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:10,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1094289719, now seen corresponding path program 12 times [2021-04-15 04:48:10,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:10,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125197214] [2021-04-15 04:48:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125197214] [2021-04-15 04:48:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771304572] [2021-04-15 04:48:10,855 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 [2021-04-15 04:48:10,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:48:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:10,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:10,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:10,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 04:48:10,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714881648] [2021-04-15 04:48:10,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:10,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:10,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:10,972 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 04:48:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:11,296 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-04-15 04:48:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 04:48:11,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-04-15 04:48:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:11,303 INFO L225 Difference]: With dead ends: 1329 [2021-04-15 04:48:11,303 INFO L226 Difference]: Without dead ends: 1329 [2021-04-15 04:48:11,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:48:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-04-15 04:48:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-04-15 04:48:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-04-15 04:48:11,335 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-04-15 04:48:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:11,335 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-04-15 04:48:11,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 04:48:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-04-15 04:48:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:11,337 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:11,338 INFO L551 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] [2021-04-15 04:48:11,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:11,565 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash 661413115, now seen corresponding path program 13 times [2021-04-15 04:48:11,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:11,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467038278] [2021-04-15 04:48:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:11,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467038278] [2021-04-15 04:48:11,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251237612] [2021-04-15 04:48:11,622 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 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 [2021-04-15 04:48:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:11,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:11,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:11,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:48:11,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918624107] [2021-04-15 04:48:11,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:48:11,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:11,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:48:11,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:48:11,718 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-04-15 04:48:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:12,128 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-04-15 04:48:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:48:12,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-04-15 04:48:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:12,137 INFO L225 Difference]: With dead ends: 1548 [2021-04-15 04:48:12,137 INFO L226 Difference]: Without dead ends: 1544 [2021-04-15 04:48:12,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:48:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-04-15 04:48:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-04-15 04:48:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-04-15 04:48:12,169 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-04-15 04:48:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:12,169 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-04-15 04:48:12,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-04-15 04:48:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-04-15 04:48:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:12,172 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:12,172 INFO L551 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] [2021-04-15 04:48:12,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 04:48:12,398 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:12,399 INFO L82 PathProgramCache]: Analyzing trace with hash 389403925, now seen corresponding path program 14 times [2021-04-15 04:48:12,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:12,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638218333] [2021-04-15 04:48:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:12,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638218333] [2021-04-15 04:48:12,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875087660] [2021-04-15 04:48:12,451 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:48:12,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:12,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:12,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:12,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:12,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:12,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:12,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106373902] [2021-04-15 04:48:12,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:12,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:12,584 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:13,358 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-04-15 04:48:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:48:13,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 04:48:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:13,369 INFO L225 Difference]: With dead ends: 2734 [2021-04-15 04:48:13,370 INFO L226 Difference]: Without dead ends: 2734 [2021-04-15 04:48:13,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:48:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-04-15 04:48:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-04-15 04:48:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-04-15 04:48:13,416 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-04-15 04:48:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:13,416 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-04-15 04:48:13,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-04-15 04:48:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:13,418 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:13,418 INFO L551 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] [2021-04-15 04:48:13,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 04:48:13,641 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash 956356005, now seen corresponding path program 15 times [2021-04-15 04:48:13,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:13,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964813418] [2021-04-15 04:48:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:13,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964813418] [2021-04-15 04:48:13,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527190079] [2021-04-15 04:48:13,691 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:13,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:48:13,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:13,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:13,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:13,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505951364] [2021-04-15 04:48:13,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:13,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:13,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:13,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:13,822 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:14,528 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-04-15 04:48:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:48:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 04:48:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:14,536 INFO L225 Difference]: With dead ends: 2693 [2021-04-15 04:48:14,537 INFO L226 Difference]: Without dead ends: 2693 [2021-04-15 04:48:14,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:48:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-04-15 04:48:14,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-04-15 04:48:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-04-15 04:48:14,574 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-04-15 04:48:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:14,574 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-04-15 04:48:14,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-04-15 04:48:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:14,577 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:14,577 INFO L551 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] [2021-04-15 04:48:14,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 04:48:14,791 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:14,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:14,791 INFO L82 PathProgramCache]: Analyzing trace with hash -215989853, now seen corresponding path program 16 times [2021-04-15 04:48:14,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:14,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035529693] [2021-04-15 04:48:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:14,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035529693] [2021-04-15 04:48:14,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562728056] [2021-04-15 04:48:14,834 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 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 [2021-04-15 04:48:14,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:14,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:14,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:14,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:14,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:48:14,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19616055] [2021-04-15 04:48:14,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:48:14,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:14,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:48:14,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:48:14,962 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:15,568 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-04-15 04:48:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 04:48:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:15,575 INFO L225 Difference]: With dead ends: 2677 [2021-04-15 04:48:15,575 INFO L226 Difference]: Without dead ends: 2677 [2021-04-15 04:48:15,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:48:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-04-15 04:48:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-04-15 04:48:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-04-15 04:48:15,635 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-04-15 04:48:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:15,636 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-04-15 04:48:15,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-04-15 04:48:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:15,640 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:15,640 INFO L551 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] [2021-04-15 04:48:15,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-04-15 04:48:15,853 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash -134613765, now seen corresponding path program 17 times [2021-04-15 04:48:15,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:15,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989089866] [2021-04-15 04:48:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:15,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989089866] [2021-04-15 04:48:15,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288376207] [2021-04-15 04:48:15,893 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 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 [2021-04-15 04:48:15,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:48:15,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:15,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:15,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:15,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:48:15,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586870144] [2021-04-15 04:48:15,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:48:15,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:15,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:48:15,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:48:15,989 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:16,604 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-04-15 04:48:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:48:16,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:16,609 INFO L225 Difference]: With dead ends: 2474 [2021-04-15 04:48:16,609 INFO L226 Difference]: Without dead ends: 2470 [2021-04-15 04:48:16,609 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:48:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-04-15 04:48:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-04-15 04:48:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-04-15 04:48:16,651 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-04-15 04:48:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:16,651 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-04-15 04:48:16,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-04-15 04:48:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:16,653 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:16,654 INFO L551 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] [2021-04-15 04:48:16,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:16,869 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash 796043451, now seen corresponding path program 18 times [2021-04-15 04:48:16,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:16,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335416080] [2021-04-15 04:48:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:16,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335416080] [2021-04-15 04:48:16,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450424743] [2021-04-15 04:48:16,913 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 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 [2021-04-15 04:48:16,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:48:16,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:16,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:16,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:17,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:17,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:17,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446270] [2021-04-15 04:48:17,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:17,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:17,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:17,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:17,051 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:17,782 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-04-15 04:48:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 04:48:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 04:48:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:17,790 INFO L225 Difference]: With dead ends: 2514 [2021-04-15 04:48:17,790 INFO L226 Difference]: Without dead ends: 2514 [2021-04-15 04:48:17,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:48:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-04-15 04:48:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-04-15 04:48:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-04-15 04:48:17,836 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-04-15 04:48:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:17,836 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-04-15 04:48:17,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-04-15 04:48:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:17,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:17,840 INFO L551 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] [2021-04-15 04:48:18,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-04-15 04:48:18,053 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:18,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1855884691, now seen corresponding path program 19 times [2021-04-15 04:48:18,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:18,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209108980] [2021-04-15 04:48:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:18,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209108980] [2021-04-15 04:48:18,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306253921] [2021-04-15 04:48:18,099 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 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 [2021-04-15 04:48:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:18,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:18,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:18,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107795778] [2021-04-15 04:48:18,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:18,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:18,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:18,202 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:18,997 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-04-15 04:48:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:48:18,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 04:48:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:19,005 INFO L225 Difference]: With dead ends: 2332 [2021-04-15 04:48:19,005 INFO L226 Difference]: Without dead ends: 2328 [2021-04-15 04:48:19,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:48:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-04-15 04:48:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-04-15 04:48:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-04-15 04:48:19,042 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-04-15 04:48:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:19,042 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-04-15 04:48:19,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-04-15 04:48:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:19,045 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:19,045 INFO L551 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] [2021-04-15 04:48:19,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-04-15 04:48:19,265 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1526797053, now seen corresponding path program 3 times [2021-04-15 04:48:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:19,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583435653] [2021-04-15 04:48:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:48:19,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583435653] [2021-04-15 04:48:19,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734919682] [2021-04-15 04:48:19,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:48:19,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:48:19,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:19,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:48:19,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:48:19,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:19,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 04:48:19,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717295772] [2021-04-15 04:48:19,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 04:48:19,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 04:48:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:48:19,396 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:19,507 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-04-15 04:48:19,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:48:19,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:19,511 INFO L225 Difference]: With dead ends: 929 [2021-04-15 04:48:19,511 INFO L226 Difference]: Without dead ends: 929 [2021-04-15 04:48:19,511 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:48:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-04-15 04:48:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-04-15 04:48:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-04-15 04:48:19,548 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-04-15 04:48:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:19,548 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-04-15 04:48:19,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-04-15 04:48:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:19,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:19,552 INFO L551 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] [2021-04-15 04:48:19,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:19,777 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1837970499, now seen corresponding path program 20 times [2021-04-15 04:48:19,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:19,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392440260] [2021-04-15 04:48:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:19,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392440260] [2021-04-15 04:48:19,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094679092] [2021-04-15 04:48:19,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:48:19,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:19,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:19,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:19,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:19,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:19,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 04:48:19,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122841234] [2021-04-15 04:48:19,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:48:19,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:48:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:48:19,931 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-04-15 04:48:20,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:20,334 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-04-15 04:48:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:48:20,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-04-15 04:48:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:20,340 INFO L225 Difference]: With dead ends: 1555 [2021-04-15 04:48:20,340 INFO L226 Difference]: Without dead ends: 1555 [2021-04-15 04:48:20,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:48:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-04-15 04:48:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-04-15 04:48:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-04-15 04:48:20,368 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-04-15 04:48:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:20,368 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-04-15 04:48:20,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-04-15 04:48:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-04-15 04:48:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:20,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:20,372 INFO L551 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] [2021-04-15 04:48:20,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-04-15 04:48:20,597 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:20,597 INFO L82 PathProgramCache]: Analyzing trace with hash 64708953, now seen corresponding path program 21 times [2021-04-15 04:48:20,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:20,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215472387] [2021-04-15 04:48:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215472387] [2021-04-15 04:48:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643705814] [2021-04-15 04:48:20,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:20,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:48:20,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:20,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:20,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:20,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:20,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 04:48:20,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393997775] [2021-04-15 04:48:20,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:48:20,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:48:20,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:48:20,742 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:21,038 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-04-15 04:48:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:48:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:21,043 INFO L225 Difference]: With dead ends: 1605 [2021-04-15 04:48:21,043 INFO L226 Difference]: Without dead ends: 1605 [2021-04-15 04:48:21,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:48:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-04-15 04:48:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-04-15 04:48:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-04-15 04:48:21,078 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-04-15 04:48:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:21,079 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-04-15 04:48:21,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-04-15 04:48:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:21,083 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:21,083 INFO L551 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] [2021-04-15 04:48:21,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:21,297 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash 19887811, now seen corresponding path program 22 times [2021-04-15 04:48:21,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:21,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232031285] [2021-04-15 04:48:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:48:21,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232031285] [2021-04-15 04:48:21,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028243321] [2021-04-15 04:48:21,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:21,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:21,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:48:21,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:21,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 04:48:21,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801875211] [2021-04-15 04:48:21,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:48:21,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:21,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:48:21,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:48:21,428 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:21,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:21,635 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-04-15 04:48:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 04:48:21,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:21,640 INFO L225 Difference]: With dead ends: 1524 [2021-04-15 04:48:21,640 INFO L226 Difference]: Without dead ends: 1520 [2021-04-15 04:48:21,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:48:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-04-15 04:48:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-04-15 04:48:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-04-15 04:48:21,668 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-04-15 04:48:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:21,668 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-04-15 04:48:21,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-04-15 04:48:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:21,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:21,671 INFO L551 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] [2021-04-15 04:48:21,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 04:48:21,885 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 617224469, now seen corresponding path program 23 times [2021-04-15 04:48:21,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:21,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55884794] [2021-04-15 04:48:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:21,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55884794] [2021-04-15 04:48:21,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787004271] [2021-04-15 04:48:21,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:21,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:48:21,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:21,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:22,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:22,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 04:48:22,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424658399] [2021-04-15 04:48:22,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:48:22,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:22,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:48:22,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:48:22,016 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-04-15 04:48:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:22,258 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-04-15 04:48:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:48:22,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-04-15 04:48:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:22,262 INFO L225 Difference]: With dead ends: 1508 [2021-04-15 04:48:22,262 INFO L226 Difference]: Without dead ends: 1496 [2021-04-15 04:48:22,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-04-15 04:48:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-04-15 04:48:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-04-15 04:48:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-04-15 04:48:22,298 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-04-15 04:48:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:22,298 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-04-15 04:48:22,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-04-15 04:48:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-04-15 04:48:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:22,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:22,306 INFO L551 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] [2021-04-15 04:48:22,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 04:48:22,527 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash 90804185, now seen corresponding path program 24 times [2021-04-15 04:48:22,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:22,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520031117] [2021-04-15 04:48:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:22,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520031117] [2021-04-15 04:48:22,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979240054] [2021-04-15 04:48:22,572 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 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 [2021-04-15 04:48:22,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:48:22,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:22,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:22,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:22,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:22,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489166843] [2021-04-15 04:48:22,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:22,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:22,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:22,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:22,733 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:23,321 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-04-15 04:48:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 04:48:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 04:48:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:23,327 INFO L225 Difference]: With dead ends: 2412 [2021-04-15 04:48:23,327 INFO L226 Difference]: Without dead ends: 2412 [2021-04-15 04:48:23,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:48:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-04-15 04:48:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-04-15 04:48:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-04-15 04:48:23,360 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-04-15 04:48:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:23,360 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-04-15 04:48:23,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-04-15 04:48:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:23,363 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:23,363 INFO L551 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] [2021-04-15 04:48:23,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 04:48:23,571 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash 657756265, now seen corresponding path program 25 times [2021-04-15 04:48:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:23,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247330175] [2021-04-15 04:48:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:23,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247330175] [2021-04-15 04:48:23,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645233026] [2021-04-15 04:48:23,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:48:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:23,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:23,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:23,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:23,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108488980] [2021-04-15 04:48:23,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:23,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:23,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:23,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:23,729 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:24,239 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-04-15 04:48:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 04:48:24,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 04:48:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:24,245 INFO L225 Difference]: With dead ends: 2335 [2021-04-15 04:48:24,245 INFO L226 Difference]: Without dead ends: 2335 [2021-04-15 04:48:24,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:48:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-04-15 04:48:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-04-15 04:48:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 04:48:24,284 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 04:48:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:24,285 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 04:48:24,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 04:48:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 04:48:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:24,288 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:24,288 INFO L551 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] [2021-04-15 04:48:24,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:24,516 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:24,516 INFO L82 PathProgramCache]: Analyzing trace with hash -514589593, now seen corresponding path program 26 times [2021-04-15 04:48:24,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:24,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961003150] [2021-04-15 04:48:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:24,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961003150] [2021-04-15 04:48:24,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147745809] [2021-04-15 04:48:24,595 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 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 [2021-04-15 04:48:24,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:24,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:24,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:24,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:48:24,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812581380] [2021-04-15 04:48:24,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:48:24,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:48:24,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:48:24,730 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:25,211 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-04-15 04:48:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:48:25,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:25,217 INFO L225 Difference]: With dead ends: 2285 [2021-04-15 04:48:25,217 INFO L226 Difference]: Without dead ends: 2285 [2021-04-15 04:48:25,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:48:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-04-15 04:48:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-04-15 04:48:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-04-15 04:48:25,255 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-04-15 04:48:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:25,255 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-04-15 04:48:25,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-04-15 04:48:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:25,258 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:25,258 INFO L551 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] [2021-04-15 04:48:25,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:25,473 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash -433213505, now seen corresponding path program 27 times [2021-04-15 04:48:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:25,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408905218] [2021-04-15 04:48:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:25,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408905218] [2021-04-15 04:48:25,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566141145] [2021-04-15 04:48:25,524 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 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 [2021-04-15 04:48:25,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:48:25,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:25,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:25,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:25,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:25,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:48:25,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161099881] [2021-04-15 04:48:25,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:48:25,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:25,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:48:25,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:48:25,628 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:26,122 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-04-15 04:48:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 04:48:26,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:26,127 INFO L225 Difference]: With dead ends: 2176 [2021-04-15 04:48:26,127 INFO L226 Difference]: Without dead ends: 2172 [2021-04-15 04:48:26,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:48:26,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-04-15 04:48:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-04-15 04:48:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 04:48:26,153 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 04:48:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:26,153 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 04:48:26,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 04:48:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:26,155 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:26,155 INFO L551 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] [2021-04-15 04:48:26,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:26,356 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash 497443711, now seen corresponding path program 28 times [2021-04-15 04:48:26,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:26,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215167777] [2021-04-15 04:48:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:26,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215167777] [2021-04-15 04:48:26,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682802462] [2021-04-15 04:48:26,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:48:26,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:26,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:26,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:26,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:26,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958642622] [2021-04-15 04:48:26,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:26,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:26,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:26,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:26,523 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:26,937 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-04-15 04:48:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:48:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 04:48:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:26,941 INFO L225 Difference]: With dead ends: 2199 [2021-04-15 04:48:26,941 INFO L226 Difference]: Without dead ends: 2199 [2021-04-15 04:48:26,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:48:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-04-15 04:48:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-04-15 04:48:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-04-15 04:48:26,970 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-04-15 04:48:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:26,970 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-04-15 04:48:26,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-04-15 04:48:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:26,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:26,973 INFO L551 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] [2021-04-15 04:48:27,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:27,185 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2140482865, now seen corresponding path program 29 times [2021-04-15 04:48:27,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:27,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133621491] [2021-04-15 04:48:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133621491] [2021-04-15 04:48:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458107614] [2021-04-15 04:48:27,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:48:27,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:48:27,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:27,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:27,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:27,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:27,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656994748] [2021-04-15 04:48:27,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:27,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:27,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:27,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:27,342 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:27,740 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-04-15 04:48:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:48:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 04:48:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:27,744 INFO L225 Difference]: With dead ends: 2156 [2021-04-15 04:48:27,744 INFO L226 Difference]: Without dead ends: 2152 [2021-04-15 04:48:27,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:48:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-04-15 04:48:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-04-15 04:48:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 04:48:27,774 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 04:48:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:27,774 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 04:48:27,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 04:48:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:27,777 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:27,777 INFO L551 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] [2021-04-15 04:48:28,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-04-15 04:48:28,000 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1151056447, now seen corresponding path program 30 times [2021-04-15 04:48:28,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:28,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919663193] [2021-04-15 04:48:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:28,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919663193] [2021-04-15 04:48:28,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93894188] [2021-04-15 04:48:28,040 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 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 [2021-04-15 04:48:28,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:48:28,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:28,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:28,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:48:28,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018094085] [2021-04-15 04:48:28,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:48:28,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:28,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:48:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:48:28,131 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 04:48:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:28,514 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-04-15 04:48:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:48:28,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-04-15 04:48:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:28,518 INFO L225 Difference]: With dead ends: 2097 [2021-04-15 04:48:28,518 INFO L226 Difference]: Without dead ends: 2097 [2021-04-15 04:48:28,519 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:48:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-04-15 04:48:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-04-15 04:48:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-04-15 04:48:28,547 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-04-15 04:48:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:28,548 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-04-15 04:48:28,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 04:48:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-04-15 04:48:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:28,551 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:28,551 INFO L551 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] [2021-04-15 04:48:28,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:28,761 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1069680359, now seen corresponding path program 31 times [2021-04-15 04:48:28,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:28,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203260803] [2021-04-15 04:48:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:28,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203260803] [2021-04-15 04:48:28,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568410475] [2021-04-15 04:48:28,803 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 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 [2021-04-15 04:48:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:28,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:28,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:48:28,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391757530] [2021-04-15 04:48:28,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:48:28,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:28,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:48:28,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:48:28,906 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 04:48:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:29,227 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-04-15 04:48:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:48:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-04-15 04:48:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:29,231 INFO L225 Difference]: With dead ends: 1963 [2021-04-15 04:48:29,231 INFO L226 Difference]: Without dead ends: 1959 [2021-04-15 04:48:29,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:48:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-04-15 04:48:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-04-15 04:48:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-04-15 04:48:29,262 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-04-15 04:48:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:29,262 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-04-15 04:48:29,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 04:48:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-04-15 04:48:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:29,265 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:29,265 INFO L551 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] [2021-04-15 04:48:29,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-04-15 04:48:29,491 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1710194965, now seen corresponding path program 32 times [2021-04-15 04:48:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:29,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441854391] [2021-04-15 04:48:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:29,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441854391] [2021-04-15 04:48:29,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271814159] [2021-04-15 04:48:29,533 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:48:29,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:29,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:29,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:29,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:29,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:48:29,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089271148] [2021-04-15 04:48:29,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:48:29,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:29,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:48:29,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:48:29,642 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 04:48:29,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:29,932 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-04-15 04:48:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:48:29,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-04-15 04:48:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:29,938 INFO L225 Difference]: With dead ends: 1728 [2021-04-15 04:48:29,938 INFO L226 Difference]: Without dead ends: 1716 [2021-04-15 04:48:29,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:48:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-04-15 04:48:29,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-04-15 04:48:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-04-15 04:48:29,966 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-04-15 04:48:29,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:29,966 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-04-15 04:48:29,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-04-15 04:48:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-04-15 04:48:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:29,970 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:29,970 INFO L551 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] [2021-04-15 04:48:30,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:30,194 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:30,194 INFO L82 PathProgramCache]: Analyzing trace with hash -987645615, now seen corresponding path program 33 times [2021-04-15 04:48:30,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:30,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604173909] [2021-04-15 04:48:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604173909] [2021-04-15 04:48:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159874388] [2021-04-15 04:48:30,240 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 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 [2021-04-15 04:48:30,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:48:30,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:30,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:30,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:30,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:30,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:30,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285945671] [2021-04-15 04:48:30,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:30,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:30,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:30,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:30,370 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:30,741 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-04-15 04:48:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:48:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 04:48:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:30,744 INFO L225 Difference]: With dead ends: 1821 [2021-04-15 04:48:30,745 INFO L226 Difference]: Without dead ends: 1821 [2021-04-15 04:48:30,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:48:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-04-15 04:48:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-04-15 04:48:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-04-15 04:48:30,769 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-04-15 04:48:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:30,769 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-04-15 04:48:30,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-04-15 04:48:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:30,772 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:30,772 INFO L551 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] [2021-04-15 04:48:30,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 04:48:30,987 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:30,988 INFO L82 PathProgramCache]: Analyzing trace with hash 655393539, now seen corresponding path program 34 times [2021-04-15 04:48:30,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:30,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800770968] [2021-04-15 04:48:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:31,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800770968] [2021-04-15 04:48:31,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466846071] [2021-04-15 04:48:31,038 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 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 [2021-04-15 04:48:31,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:31,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:31,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:31,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:31,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:31,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 04:48:31,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125499962] [2021-04-15 04:48:31,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:48:31,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:48:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:48:31,146 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:31,449 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-04-15 04:48:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 04:48:31,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-04-15 04:48:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:31,453 INFO L225 Difference]: With dead ends: 1790 [2021-04-15 04:48:31,453 INFO L226 Difference]: Without dead ends: 1786 [2021-04-15 04:48:31,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:48:31,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-04-15 04:48:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-04-15 04:48:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-04-15 04:48:31,475 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-04-15 04:48:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:31,476 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-04-15 04:48:31,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-04-15 04:48:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-04-15 04:48:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:48:31,479 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:31,479 INFO L551 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] [2021-04-15 04:48:31,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 04:48:31,705 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash -612063639, now seen corresponding path program 35 times [2021-04-15 04:48:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:31,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964210750] [2021-04-15 04:48:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:31,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964210750] [2021-04-15 04:48:31,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016398196] [2021-04-15 04:48:31,748 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 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 [2021-04-15 04:48:31,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:48:31,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:31,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 04:48:31,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:31,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:31,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:48:31,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109884531] [2021-04-15 04:48:31,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:48:31,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:31,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:48:31,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:48:31,837 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:32,016 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-04-15 04:48:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:48:32,017 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 04:48:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:32,020 INFO L225 Difference]: With dead ends: 1649 [2021-04-15 04:48:32,020 INFO L226 Difference]: Without dead ends: 1637 [2021-04-15 04:48:32,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:48:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-04-15 04:48:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-04-15 04:48:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-04-15 04:48:32,054 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-04-15 04:48:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:32,054 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-04-15 04:48:32,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-04-15 04:48:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-04-15 04:48:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:48:32,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:32,057 INFO L551 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, 1] [2021-04-15 04:48:32,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:32,258 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:32,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:32,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2003913975, now seen corresponding path program 4 times [2021-04-15 04:48:32,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:32,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177105674] [2021-04-15 04:48:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:32,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177105674] [2021-04-15 04:48:32,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536655593] [2021-04-15 04:48:32,539 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 [2021-04-15 04:48:32,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:32,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:48:32,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:32,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:32,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-04-15 04:48:32,791 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:32,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:32,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:32,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:48:32,807 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:32,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:32,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:32,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-04-15 04:48:32,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:32,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:32,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:32,851 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-04-15 04:48:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:32,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:32,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 04:48:32,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741674746] [2021-04-15 04:48:32,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:48:32,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:32,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:48:32,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:48:32,872 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-04-15 04:48:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:34,068 INFO L93 Difference]: Finished difference Result 1650 states and 5371 transitions. [2021-04-15 04:48:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:48:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 26 [2021-04-15 04:48:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:34,073 INFO L225 Difference]: With dead ends: 1650 [2021-04-15 04:48:34,073 INFO L226 Difference]: Without dead ends: 1635 [2021-04-15 04:48:34,073 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 997.0ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:48:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-04-15 04:48:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1163. [2021-04-15 04:48:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.37263339070568) internal successors, (3919), 1162 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3919 transitions. [2021-04-15 04:48:34,097 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3919 transitions. Word has length 26 [2021-04-15 04:48:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:34,097 INFO L480 AbstractCegarLoop]: Abstraction has 1163 states and 3919 transitions. [2021-04-15 04:48:34,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-04-15 04:48:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3919 transitions. [2021-04-15 04:48:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:48:34,100 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:34,101 INFO L551 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, 1] [2021-04-15 04:48:34,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:34,329 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash -24484041, now seen corresponding path program 5 times [2021-04-15 04:48:34,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:34,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73868714] [2021-04-15 04:48:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:34,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73868714] [2021-04-15 04:48:34,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140542570] [2021-04-15 04:48:34,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:48:34,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:48:34,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:48:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:34,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:34,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-04-15 04:48:34,885 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:34,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:34,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:34,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:48:34,900 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:34,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-04-15 04:48:34,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,931 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-04-15 04:48:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:34,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:34,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 04:48:34,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014864390] [2021-04-15 04:48:34,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 04:48:34,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:34,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 04:48:34,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:48:34,953 INFO L87 Difference]: Start difference. First operand 1163 states and 3919 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-04-15 04:48:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:35,956 INFO L93 Difference]: Finished difference Result 1528 states and 5014 transitions. [2021-04-15 04:48:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 04:48:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 26 [2021-04-15 04:48:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:35,959 INFO L225 Difference]: With dead ends: 1528 [2021-04-15 04:48:35,959 INFO L226 Difference]: Without dead ends: 1513 [2021-04-15 04:48:35,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 970.3ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:48:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-04-15 04:48:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1180. [2021-04-15 04:48:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3621713316369806) internal successors, (3964), 1179 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3964 transitions. [2021-04-15 04:48:35,980 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3964 transitions. Word has length 26 [2021-04-15 04:48:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:35,980 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3964 transitions. [2021-04-15 04:48:35,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-04-15 04:48:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3964 transitions. [2021-04-15 04:48:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:48:35,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:35,983 INFO L551 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] [2021-04-15 04:48:36,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:36,184 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:36,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1566945267, now seen corresponding path program 36 times [2021-04-15 04:48:36,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:36,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4329846] [2021-04-15 04:48:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:36,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4329846] [2021-04-15 04:48:36,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140929614] [2021-04-15 04:48:36,612 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 [2021-04-15 04:48:36,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:48:36,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:48:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:36,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:36,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:36,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-04-15 04:48:36,846 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:36,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:36,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:36,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:36,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:36,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:36,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-04-15 04:48:36,866 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:36,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:36,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:36,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-04-15 04:48:36,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:36,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:36,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:36,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-04-15 04:48:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:36,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:36,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 04:48:36,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505292759] [2021-04-15 04:48:36,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:48:36,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:48:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:48:36,923 INFO L87 Difference]: Start difference. First operand 1180 states and 3964 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-04-15 04:48:37,890 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-04-15 04:48:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:39,037 INFO L93 Difference]: Finished difference Result 1675 states and 5418 transitions. [2021-04-15 04:48:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:48:39,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-04-15 04:48:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:39,040 INFO L225 Difference]: With dead ends: 1675 [2021-04-15 04:48:39,041 INFO L226 Difference]: Without dead ends: 1660 [2021-04-15 04:48:39,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2002.1ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 04:48:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-04-15 04:48:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1204. [2021-04-15 04:48:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.344139650872818) internal successors, (4023), 1203 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 4023 transitions. [2021-04-15 04:48:39,062 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 4023 transitions. Word has length 26 [2021-04-15 04:48:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:39,062 INFO L480 AbstractCegarLoop]: Abstraction has 1204 states and 4023 transitions. [2021-04-15 04:48:39,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-04-15 04:48:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 4023 transitions. [2021-04-15 04:48:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:48:39,064 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:39,064 INFO L551 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, 1] [2021-04-15 04:48:39,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:39,265 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1922974853, now seen corresponding path program 6 times [2021-04-15 04:48:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:39,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051248] [2021-04-15 04:48:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:39,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051248] [2021-04-15 04:48:39,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397550333] [2021-04-15 04:48:39,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:48:39,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:48:39,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:48:39,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:39,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:39,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:39,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:39,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-04-15 04:48:39,861 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:39,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:39,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:39,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:39,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:39,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-04-15 04:48:39,926 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:39,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:39,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:39,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 53 [2021-04-15 04:48:39,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-04-15 04:48:40,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:40,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:40,083 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:17 [2021-04-15 04:48:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:40,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:40,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 04:48:40,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106740572] [2021-04-15 04:48:40,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:48:40,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:40,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:48:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:48:40,150 INFO L87 Difference]: Start difference. First operand 1204 states and 4023 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-04-15 04:48:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:42,050 INFO L93 Difference]: Finished difference Result 1871 states and 5965 transitions. [2021-04-15 04:48:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 04:48:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-04-15 04:48:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:42,054 INFO L225 Difference]: With dead ends: 1871 [2021-04-15 04:48:42,054 INFO L226 Difference]: Without dead ends: 1856 [2021-04-15 04:48:42,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1431.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 04:48:42,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-04-15 04:48:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1222. [2021-04-15 04:48:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3497133497133498) internal successors, (4090), 1221 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4090 transitions. [2021-04-15 04:48:42,079 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4090 transitions. Word has length 26 [2021-04-15 04:48:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:42,079 INFO L480 AbstractCegarLoop]: Abstraction has 1222 states and 4090 transitions. [2021-04-15 04:48:42,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-04-15 04:48:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4090 transitions. [2021-04-15 04:48:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:48:42,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:42,082 INFO L551 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] [2021-04-15 04:48:42,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:42,285 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:42,285 INFO L82 PathProgramCache]: Analyzing trace with hash -372593289, now seen corresponding path program 37 times [2021-04-15 04:48:42,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:42,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264483128] [2021-04-15 04:48:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:42,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264483128] [2021-04-15 04:48:42,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905556306] [2021-04-15 04:48:42,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:42,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:48:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:42,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:42,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:42,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-04-15 04:48:42,948 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:42,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:42,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:42,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:42,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:42,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-04-15 04:48:42,973 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:42,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:42,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:42,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-04-15 04:48:42,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:43,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:43,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:43,013 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-04-15 04:48:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:43,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:43,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 04:48:43,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481171142] [2021-04-15 04:48:43,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:48:43,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:43,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:48:43,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:48:43,059 INFO L87 Difference]: Start difference. First operand 1222 states and 4090 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-04-15 04:48:43,680 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-04-15 04:48:44,148 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-04-15 04:48:44,928 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-04-15 04:48:45,283 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-04-15 04:48:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:45,801 INFO L93 Difference]: Finished difference Result 1892 states and 6052 transitions. [2021-04-15 04:48:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 04:48:45,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-04-15 04:48:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:45,805 INFO L225 Difference]: With dead ends: 1892 [2021-04-15 04:48:45,805 INFO L226 Difference]: Without dead ends: 1877 [2021-04-15 04:48:45,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2450.1ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:48:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-04-15 04:48:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1227. [2021-04-15 04:48:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 3.3515497553017943) internal successors, (4109), 1226 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4109 transitions. [2021-04-15 04:48:45,829 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4109 transitions. Word has length 26 [2021-04-15 04:48:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:45,829 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 4109 transitions. [2021-04-15 04:48:45,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-04-15 04:48:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4109 transitions. [2021-04-15 04:48:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:48:45,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:45,832 INFO L551 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] [2021-04-15 04:48:46,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:46,032 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1348912133, now seen corresponding path program 38 times [2021-04-15 04:48:46,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:46,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569059574] [2021-04-15 04:48:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569059574] [2021-04-15 04:48:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050627795] [2021-04-15 04:48:46,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:46,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:46,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:46,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:48:46,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:51,391 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:48:52,596 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:48:52,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:52,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 158 [2021-04-15 04:48:54,100 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:54,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:54,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:54,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 176 [2021-04-15 04:48:58,890 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:58,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:59,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:59,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 159 [2021-04-15 04:49:00,619 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 249 [2021-04-15 04:49:00,863 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 478 [2021-04-15 04:49:01,486 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 581 [2021-04-15 04:49:02,039 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 581 [2021-04-15 04:49:02,677 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 581 [2021-04-15 04:49:03,047 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 545 [2021-04-15 04:49:03,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 5 xjuncts. [2021-04-15 04:49:24,554 WARN L205 SmtUtils]: Spent 21.49 s on a formula simplification. DAG size of input: 601 DAG size of output: 456 [2021-04-15 04:49:24,556 INFO L628 ElimStorePlain]: treesize reduction 151642, result has 27.9 percent of original size [2021-04-15 04:49:24,708 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 422 [2021-04-15 04:49:25,699 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 400 [2021-04-15 04:49:25,849 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 408 [2021-04-15 04:49:25,964 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 429 [2021-04-15 04:49:26,843 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 481 [2021-04-15 04:49:27,003 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 481 [2021-04-15 04:49:27,166 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 486 [2021-04-15 04:49:27,339 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 537 [2021-04-15 04:49:27,656 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 456 [2021-04-15 04:49:27,823 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 456 [2021-04-15 04:49:27,983 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 460 [2021-04-15 04:49:28,091 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 473 [2021-04-15 04:49:29,018 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 430 [2021-04-15 04:49:29,128 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 430 [2021-04-15 04:49:29,241 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 433 [2021-04-15 04:49:29,376 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 451 [2021-04-15 04:49:29,516 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 411 [2021-04-15 04:49:29,637 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 411 [2021-04-15 04:49:29,768 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 417 [2021-04-15 04:49:29,903 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 430 Received shutdown request... [2021-04-15 05:02:15,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-04-15 05:02:15,649 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 05:02:15,652 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 05:02:15,652 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 05:02:15 BasicIcfg [2021-04-15 05:02:15,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 05:02:15,653 INFO L168 Benchmark]: Toolchain (without parser) took 859200.02 ms. Allocated memory was 348.1 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 328.4 MB in the beginning and 2.4 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. [2021-04-15 05:02:15,653 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 348.1 MB. Free memory was 329.6 MB in the beginning and 329.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:02:15,653 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.09 ms. Allocated memory is still 348.1 MB. Free memory was 328.4 MB in the beginning and 326.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:02:15,653 INFO L168 Benchmark]: Boogie Preprocessor took 22.08 ms. Allocated memory is still 348.1 MB. Free memory was 326.9 MB in the beginning and 325.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:02:15,653 INFO L168 Benchmark]: RCFGBuilder took 355.99 ms. Allocated memory is still 348.1 MB. Free memory was 325.8 MB in the beginning and 312.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-04-15 05:02:15,653 INFO L168 Benchmark]: TraceAbstraction took 858781.82 ms. Allocated memory was 348.1 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 312.3 MB in the beginning and 2.4 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. [2021-04-15 05:02:15,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 348.1 MB. Free memory was 329.6 MB in the beginning and 329.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.09 ms. Allocated memory is still 348.1 MB. Free memory was 328.4 MB in the beginning and 326.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.08 ms. Allocated memory is still 348.1 MB. Free memory was 326.9 MB in the beginning and 325.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 355.99 ms. Allocated memory is still 348.1 MB. Free memory was 325.8 MB in the beginning and 312.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 858781.82 ms. Allocated memory was 348.1 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 312.3 MB in the beginning and 2.4 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 67). Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 858574.6ms, OverallIterations: 47, TraceHistogramMax: 2, EmptinessCheckTime: 135.4ms, AutomataDifference: 25643.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 62.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1520 SDtfs, 9341 SDslu, 9391 SDs, 0 SdLazy, 15051 SolverSat, 1395 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8217.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2170 GetRequests, 860 SyntacticMatches, 36 SemanticMatches, 1274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13056 ImplicationChecksByTransitivity, 18488.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1227occurred in iteration=46, InterpolantAutomatonStates: 1159, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1299.8ms AutomataMinimizationTime, 46 MinimizatonAttempts, 34476 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 208.5ms SsaConstructionTime, 657.0ms SatisfiabilityAnalysisTime, 10547.1ms InterpolantComputationTime, 2126 NumberOfCodeBlocks, 2126 NumberOfCodeBlocksAsserted, 137 NumberOfCheckSat, 2037 ConstructedInterpolants, 2 QuantifiedInterpolants, 16708 SizeOfPredicates, 169 NumberOfNonLiveVariables, 2628 ConjunctsInSsa, 419 ConjunctsInUnsatCore, 89 InterpolantComputations, 3 PerfectInterpolantSequences, 107/414 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown